From a49d260ac96f5da0edc33674669ad8f19cb49a63 Mon Sep 17 00:00:00 2001
From: Min RK <benjaminrk@gmail.com>
Date: Wed, 3 Mar 2021 11:18:27 +0100
Subject: [PATCH 1/8] Freeze enviornment with conda-lock

approximately one million times faster than running a full install

installation time should be faster, too, as there is no solve
---
 repo2docker/buildpacks/conda/environment.yml |  2 +
 repo2docker/buildpacks/conda/freeze.py       | 66 +++++++-------------
 2 files changed, 26 insertions(+), 42 deletions(-)

diff --git a/repo2docker/buildpacks/conda/environment.yml b/repo2docker/buildpacks/conda/environment.yml
index ccb88e10..26483d77 100644
--- a/repo2docker/buildpacks/conda/environment.yml
+++ b/repo2docker/buildpacks/conda/environment.yml
@@ -1,3 +1,5 @@
+channels:
+  - conda-forge
 dependencies:
   - python=3.7
   - ipywidgets==7.6.3
diff --git a/repo2docker/buildpacks/conda/freeze.py b/repo2docker/buildpacks/conda/freeze.py
index fd98ed5b..dbb28674 100755
--- a/repo2docker/buildpacks/conda/freeze.py
+++ b/repo2docker/buildpacks/conda/freeze.py
@@ -2,7 +2,7 @@
 """
 Freeze the conda environment.yml
 
-It runs the freeze in a continuumio/miniconda3 image to ensure portability
+Using conda-lock
 
 Usage:
 
@@ -19,12 +19,6 @@ import sys
 from ruamel.yaml import YAML
 
 
-DOCKER_IMAGE = "condaforge/mambaforge:4.9.2-5"
-# set mamba and/or conda versions
-# if needed to differ from what's in the image
-MAMBA_VERSION = ""
-CONDA_VERSION = ""
-
 HERE = pathlib.Path(os.path.dirname(os.path.abspath(__file__)))
 
 ENV_FILE = HERE / "environment.yml"
@@ -36,13 +30,12 @@ FROZEN_FILE_T = os.path.splitext(ENV_FILE_T)[0] + ".frozen.yml"
 yaml = YAML(typ="rt")
 
 
-def freeze(env_file, frozen_file):
+def freeze(env_file, frozen_file, platform="linux-64"):
     """Freeze a conda environment.yml
 
-    By running in docker:
+    By running
 
-        mamba env create
-        mamba env export
+        conda-lock --mamba --platform=linux-64 -f environment.yml
 
     Result will be stored in frozen_file
     """
@@ -58,43 +51,32 @@ def freeze(env_file, frozen_file):
                 return
     print(f"Freezing {env_file} -> {frozen_file}")
 
+    # FIXME: conda-lock 0.8 requires {platform} in template
+    # https://github.com/conda-incubator/conda-lock/pull/78
+    frozen_template = str(frozen_dest) + ".{platform}"
+    frozen_tempfile = pathlib.Path(frozen_template.format(platform=platform))
+
+    check_call(
+        [
+            "conda-lock",
+            # FIXME: adopt micromamba after ordering is fixed
+            # https://github.com/conda-incubator/conda-lock/issues/79
+            "--mamba",
+            f"--platform={platform}",
+            f"--filename-template={frozen_template}",
+            f"--file={env_file}",
+        ]
+    )
+
     with frozen_dest.open("w") as f:
         f.write(
             f"# AUTO GENERATED FROM {env_file.relative_to(HERE)}, DO NOT MANUALLY MODIFY\n"
         )
         f.write(f"# Frozen on {datetime.utcnow():%Y-%m-%d %H:%M:%S UTC}\n")
+        with frozen_tempfile.open() as temp:
+            f.write(temp.read())
 
-    check_call(
-        [
-            "docker",
-            "run",
-            "--rm",
-            "-v" f"{HERE}:/r2d",
-            "-it",
-            DOCKER_IMAGE,
-            "sh",
-            "-c",
-            "; ".join(
-                [
-                    "set -ex",
-                    "conda config --set channel_priority strict",
-                    "conda config --add channels conda-forge",
-                    f"mamba install -yq -S mamba={MAMBA_VERSION}"
-                    if MAMBA_VERSION
-                    else "true",
-                    f"mamba install -yq -S conda={CONDA_VERSION}"
-                    if CONDA_VERSION
-                    else "true",
-                    "conda config --system --set auto_update_conda false",
-                    f"mamba env create -v -f /r2d/{env_file.relative_to(HERE)} -n r2d",
-                    # add conda-forge broken channel as lowest priority in case
-                    # any of our frozen packages are marked as broken after freezing
-                    "conda config --append channels conda-forge/label/broken",
-                    f"mamba env export -n r2d >> /r2d/{frozen_file.relative_to(HERE)}",
-                ]
-            ),
-        ]
-    )
+    os.remove(frozen_tempfile)
 
 
 def set_python(py_env_file, py):

From 1e240efc967183a69075e452523d89ca252984e4 Mon Sep 17 00:00:00 2001
From: Min RK <benjaminrk@gmail.com>
Date: Wed, 3 Mar 2021 11:18:47 +0100
Subject: [PATCH 2/8] refreeze with conda-lock

---
 .../buildpacks/conda/environment.frozen.yml   | 258 +++++++++--------
 .../conda/environment.py-2.7.frozen.yml       | 110 ++++----
 .../buildpacks/conda/environment.py-2.7.yml   |   2 +
 .../conda/environment.py-3.6.frozen.yml       | 267 +++++++++---------
 .../buildpacks/conda/environment.py-3.6.yml   |   4 +-
 .../conda/environment.py-3.7.frozen.yml       | 258 +++++++++--------
 .../buildpacks/conda/environment.py-3.7.yml   |   4 +-
 .../conda/environment.py-3.8.frozen.yml       | 256 ++++++++---------
 .../buildpacks/conda/environment.py-3.8.yml   |   4 +-
 .../conda/environment.py-3.9.frozen.yml       | 258 +++++++++--------
 .../buildpacks/conda/environment.py-3.9.yml   |   4 +-
 11 files changed, 701 insertions(+), 724 deletions(-)

diff --git a/repo2docker/buildpacks/conda/environment.frozen.yml b/repo2docker/buildpacks/conda/environment.frozen.yml
index daca3f21..cdd0de11 100644
--- a/repo2docker/buildpacks/conda/environment.frozen.yml
+++ b/repo2docker/buildpacks/conda/environment.frozen.yml
@@ -1,133 +1,127 @@
 # AUTO GENERATED FROM environment.py-3.7.yml, DO NOT MANUALLY MODIFY
-# Frozen on 2021-02-22 12:26:46 UTC
-name: r2d
-channels:
-  - conda-forge
-  - defaults
-  - conda-forge/label/broken
-dependencies:
-  - _libgcc_mutex=0.1=conda_forge
-  - _openmp_mutex=4.5=1_gnu
-  - alembic=1.5.5=pyhd8ed1ab_0
-  - anyio=2.1.0=py37h89c1867_0
-  - argon2-cffi=20.1.0=py37h8f50634_2
-  - async_generator=1.10=py_0
-  - attrs=20.3.0=pyhd3deb0d_0
-  - babel=2.9.0=pyhd3deb0d_0
-  - backcall=0.2.0=pyh9f0ad1d_0
-  - backports=1.0=py_2
-  - backports.functools_lru_cache=1.6.1=py_0
-  - bleach=3.3.0=pyh44b312d_0
-  - blinker=1.4=py_1
-  - brotlipy=0.7.0=py37hb5d75c8_1001
-  - c-ares=1.17.1=h36c2ea0_0
-  - ca-certificates=2020.12.5=ha878542_0
-  - certifi=2020.12.5=py37h89c1867_1
-  - certipy=0.1.3=py_0
-  - cffi=1.14.5=py37hc58025e_0
-  - chardet=4.0.0=py37h89c1867_1
-  - cryptography=3.4.4=py37hf1a17b8_0
-  - decorator=4.4.2=py_0
-  - defusedxml=0.6.0=py_0
-  - entrypoints=0.3=py37hc8dfbb8_1002
-  - idna=2.10=pyh9f0ad1d_0
-  - importlib-metadata=3.4.0=py37h89c1867_0
-  - importlib_metadata=3.4.0=hd8ed1ab_0
-  - ipykernel=5.5.0=py37h888b3d9_1
-  - ipython=7.20.0=py37h888b3d9_2
-  - ipython_genutils=0.2.0=py_1
-  - ipywidgets=7.6.3=pyhd3deb0d_0
-  - jedi=0.18.0=py37h89c1867_2
-  - jinja2=2.11.3=pyh44b312d_0
-  - json5=0.9.5=pyh9f0ad1d_0
-  - jsonschema=3.2.0=py37hc8dfbb8_1
-  - jupyter-offlinenotebook=0.2.1=pyhd8ed1ab_0
-  - jupyter-resource-usage=0.5.1=pyhd8ed1ab_0
-  - jupyter_client=6.1.11=pyhd8ed1ab_1
-  - jupyter_core=4.7.1=py37h89c1867_0
-  - jupyter_server=1.4.0=py37h89c1867_0
-  - jupyter_telemetry=0.1.0=pyhd8ed1ab_1
-  - jupyterhub-base=1.3.0=py37h89c1867_0
-  - jupyterhub-singleuser=1.3.0=py37h89c1867_0
-  - jupyterlab=3.0.7=pyhd8ed1ab_0
-  - jupyterlab_pygments=0.1.2=pyh9f0ad1d_0
-  - jupyterlab_server=2.3.0=pyhd8ed1ab_0
-  - jupyterlab_widgets=1.0.0=pyhd8ed1ab_1
-  - krb5=1.17.2=h926e7f8_0
-  - ld_impl_linux-64=2.35.1=hea4e1c9_2
-  - libcurl=7.71.1=hcdd3856_8
-  - libedit=3.1.20191231=he28a2e2_2
-  - libev=4.33=h516909a_1
-  - libffi=3.3=h58526e2_2
-  - libgcc-ng=9.3.0=h2828fa1_18
-  - libgomp=9.3.0=h2828fa1_18
-  - libnghttp2=1.43.0=h812cca2_0
-  - libsodium=1.0.18=h516909a_1
-  - libssh2=1.9.0=hab1572f_5
-  - libstdcxx-ng=9.3.0=h6de172a_18
-  - mako=1.1.4=pyh44b312d_0
-  - markupsafe=1.1.1=py37h5e8e339_3
-  - mistune=0.8.4=py37h5e8e339_1003
-  - nbclassic=0.2.6=pyhd8ed1ab_0
-  - nbclient=0.5.2=pyhd8ed1ab_0
-  - nbconvert=6.0.7=py37h89c1867_3
-  - nbformat=5.1.2=pyhd8ed1ab_1
-  - ncurses=6.2=h58526e2_4
-  - nest-asyncio=1.4.3=pyhd8ed1ab_0
-  - notebook=6.2.0=py37h89c1867_0
-  - nteract_on_jupyter=2.1.3=py_0
-  - oauthlib=3.0.1=py_0
-  - openssl=1.1.1j=h7f98852_0
-  - packaging=20.9=pyh44b312d_0
-  - pamela=1.0.0=py_0
-  - pandoc=2.11.4=h7f98852_0
-  - pandocfilters=1.4.2=py_1
-  - parso=0.8.1=pyhd8ed1ab_0
-  - pexpect=4.8.0=py37hc8dfbb8_1
-  - pickleshare=0.7.5=py37hc8dfbb8_1002
-  - pip=21.0.1=pyhd8ed1ab_0
-  - prometheus_client=0.9.0=pyhd3deb0d_0
-  - prompt-toolkit=3.0.16=pyha770c72_0
-  - psutil=5.8.0=py37h5e8e339_1
-  - ptyprocess=0.7.0=pyhd3deb0d_0
-  - pycparser=2.20=pyh9f0ad1d_2
-  - pycurl=7.43.0.6=py37h88a64d2_1
-  - pygments=2.8.0=pyhd8ed1ab_0
-  - pyjwt=2.0.1=pyhd8ed1ab_0
-  - pyopenssl=20.0.1=pyhd8ed1ab_0
-  - pyparsing=2.4.7=pyh9f0ad1d_0
-  - pyrsistent=0.17.3=py37h5e8e339_2
-  - pysocks=1.7.1=py37h89c1867_3
-  - python=3.7.10=hffdb5ce_100_cpython
-  - python-dateutil=2.8.1=py_0
-  - python-editor=1.0.4=py_0
-  - python-json-logger=2.0.1=pyh9f0ad1d_0
-  - python_abi=3.7=1_cp37m
-  - pytz=2021.1=pyhd8ed1ab_0
-  - pyzmq=22.0.3=py37h499b945_0
-  - readline=8.0=he28a2e2_2
-  - requests=2.25.1=pyhd3deb0d_0
-  - ruamel.yaml=0.16.12=py37h5e8e339_2
-  - ruamel.yaml.clib=0.2.2=py37h5e8e339_2
-  - send2trash=1.5.0=py_0
-  - setuptools=49.6.0=py37h89c1867_3
-  - six=1.15.0=pyh9f0ad1d_0
-  - sniffio=1.2.0=py37h89c1867_1
-  - sqlalchemy=1.3.23=py37h5e8e339_0
-  - sqlite=3.34.0=h74cdb3f_0
-  - terminado=0.9.2=py37h89c1867_0
-  - testpath=0.4.4=py_0
-  - tk=8.6.10=hed695b0_1
-  - tornado=6.1=py37h5e8e339_1
-  - traitlets=5.0.5=py_0
-  - typing_extensions=3.7.4.3=py_0
-  - urllib3=1.26.3=pyhd8ed1ab_0
-  - wcwidth=0.2.5=pyh9f0ad1d_2
-  - webencodings=0.5.1=py_1
-  - wheel=0.36.2=pyhd3deb0d_0
-  - widgetsnbextension=3.5.1=py37hc8dfbb8_4
-  - xz=5.2.5=h516909a_1
-  - zeromq=4.3.4=h9c3ff4c_0
-  - zipp=3.4.0=py_0
-  - zlib=1.2.11=h516909a_1010
-prefix: /opt/conda/envs/r2d
+# Frozen on 2021-03-03 10:12:57 UTC
+# platform: linux-64
+# env_hash: 17b507a3f9305647319e6a222a3e371ef047067b01f5448b440895009416cc75
+@EXPLICIT
+https://conda.anaconda.org/conda-forge/linux-64/_libgcc_mutex-0.1-conda_forge.tar.bz2#d7c89558ba9fa0495403155b64376d81
+https://conda.anaconda.org/conda-forge/linux-64/ca-certificates-2020.12.5-ha878542_0.tar.bz2#7eb5d4ffeee663caa1635cd67071bc1b
+https://conda.anaconda.org/conda-forge/linux-64/ld_impl_linux-64-2.35.1-hea4e1c9_2.tar.bz2#83610dba766a186bdc7a116053b782a4
+https://conda.anaconda.org/conda-forge/linux-64/libstdcxx-ng-9.3.0-h6de172a_18.tar.bz2#2f03cd1e5c966d4af5822c7ae089ab03
+https://conda.anaconda.org/conda-forge/linux-64/pandoc-2.11.4-h7f98852_0.tar.bz2#1c827fa4db40e5e92c2619ba8fe30500
+https://conda.anaconda.org/conda-forge/linux-64/libgomp-9.3.0-h2828fa1_18.tar.bz2#fc7a2a7e6a741c8afdd764715ac7039d
+https://conda.anaconda.org/conda-forge/linux-64/_openmp_mutex-4.5-1_gnu.tar.bz2#561e277319a41d4f24f5c05a9ef63c04
+https://conda.anaconda.org/conda-forge/linux-64/libgcc-ng-9.3.0-h2828fa1_18.tar.bz2#5a9490c49a3505a6d19bda012cde6ad3
+https://conda.anaconda.org/conda-forge/linux-64/c-ares-1.17.1-h36c2ea0_0.tar.bz2#1aa683618a2df66800d568409d6841d1
+https://conda.anaconda.org/conda-forge/linux-64/libev-4.33-h516909a_1.tar.bz2#6f8720dff19e17ce5d48cfe7f3d2f0a3
+https://conda.anaconda.org/conda-forge/linux-64/libffi-3.3-h58526e2_2.tar.bz2#665369991d8dd290ac5ee92fce3e6bf5
+https://conda.anaconda.org/conda-forge/linux-64/libsodium-1.0.18-h516909a_1.tar.bz2#e1ca1a4b82f7b51b29318f80cebae84a
+https://conda.anaconda.org/conda-forge/linux-64/ncurses-6.2-h58526e2_4.tar.bz2#509f2a21c4a09214cd737a480dfd80c9
+https://conda.anaconda.org/conda-forge/linux-64/openssl-1.1.1j-h7f98852_0.tar.bz2#f91545bee2ac8cf86f1dc53e55a7bb2b
+https://conda.anaconda.org/conda-forge/linux-64/xz-5.2.5-h516909a_1.tar.bz2#33f601066901f3e1a85af3522a8113f9
+https://conda.anaconda.org/conda-forge/linux-64/zlib-1.2.11-h516909a_1010.tar.bz2#339cc5584e6d26bc73a875ba900028c3
+https://conda.anaconda.org/conda-forge/linux-64/libedit-3.1.20191231-he28a2e2_2.tar.bz2#4d331e44109e3f0e19b4cb8f9b82f3e1
+https://conda.anaconda.org/conda-forge/linux-64/libnghttp2-1.43.0-h812cca2_0.tar.bz2#1867d1e9658596b3fac8847a7702eef4
+https://conda.anaconda.org/conda-forge/linux-64/libssh2-1.9.0-hab1572f_5.tar.bz2#18aaa1bd2238ae2b5e89591046973123
+https://conda.anaconda.org/conda-forge/linux-64/readline-8.0-he28a2e2_2.tar.bz2#4d0ae8d473f863696088f76800ef9d38
+https://conda.anaconda.org/conda-forge/linux-64/tk-8.6.10-hed695b0_1.tar.bz2#7ef837cd455bd0f19f49b8b62d4cb568
+https://conda.anaconda.org/conda-forge/linux-64/zeromq-4.3.4-h9c3ff4c_0.tar.bz2#9105c7da67ebfb39ff08e2a8ea72bb71
+https://conda.anaconda.org/conda-forge/linux-64/krb5-1.17.2-h926e7f8_0.tar.bz2#926325c11478d6e781e76072c117763b
+https://conda.anaconda.org/conda-forge/linux-64/sqlite-3.34.0-h74cdb3f_0.tar.bz2#0a83e21e8c1929cc9a1e21ebb2459fc5
+https://conda.anaconda.org/conda-forge/linux-64/libcurl-7.71.1-hcdd3856_8.tar.bz2#2c81fb9f0d82c04b08617fc73eb615af
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+https://conda.anaconda.org/conda-forge/noarch/json5-0.9.5-pyh9f0ad1d_0.tar.bz2#10759827a94e6b14996e81fb002c0bda
+https://conda.anaconda.org/conda-forge/noarch/jupyterlab_widgets-1.0.0-pyhd8ed1ab_1.tar.bz2#f8da92114c8fbe1d951b0efaf54dd14b
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+https://conda.anaconda.org/conda-forge/noarch/pamela-1.0.0-py_0.tar.bz2#36f6f18d2f3ae0c93d77a9dbedad08c3
+https://conda.anaconda.org/conda-forge/noarch/pandocfilters-1.4.2-py_1.tar.bz2#ba6f4a308f1ea22abe1d72e72544af76
+https://conda.anaconda.org/conda-forge/noarch/parso-0.8.1-pyhd8ed1ab_0.tar.bz2#8b0a19d867a59005c1ae631d61a12194
+https://conda.anaconda.org/conda-forge/noarch/prometheus_client-0.9.0-pyhd3deb0d_0.tar.bz2#c7af95daf5bae22ead34151e0ab9d041
+https://conda.anaconda.org/conda-forge/noarch/ptyprocess-0.7.0-pyhd3deb0d_0.tar.bz2#359eeb6536da0e687af562ed265ec263
+https://conda.anaconda.org/conda-forge/noarch/pycparser-2.20-pyh9f0ad1d_2.tar.bz2#aa798d50ffd182a0f6f31478c7f434f6
+https://conda.anaconda.org/conda-forge/noarch/pyjwt-2.0.1-pyhd8ed1ab_0.tar.bz2#26f66f0c7433806ffde00a166e044f03
+https://conda.anaconda.org/conda-forge/noarch/pyparsing-2.4.7-pyh9f0ad1d_0.tar.bz2#626c4f20d5bf06dcec9cf2eaa31725c7
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diff --git a/repo2docker/buildpacks/conda/environment.py-2.7.frozen.yml b/repo2docker/buildpacks/conda/environment.py-2.7.frozen.yml
index 816f8c87..cedf354c 100644
--- a/repo2docker/buildpacks/conda/environment.py-2.7.frozen.yml
+++ b/repo2docker/buildpacks/conda/environment.py-2.7.frozen.yml
@@ -1,59 +1,53 @@
 # AUTO GENERATED FROM environment.py-2.7.yml, DO NOT MANUALLY MODIFY
-# Frozen on 2021-02-22 12:21:22 UTC
-name: r2d
-channels:
-  - conda-forge
-  - defaults
-  - conda-forge/label/broken
-dependencies:
-  - _libgcc_mutex=0.1=conda_forge
-  - _openmp_mutex=4.5=1_gnu
-  - backports=1.0=py27_1
-  - backports.shutil_get_terminal_size=1.0.0=py27_1
-  - backports_abc=0.5=py27_0
-  - ca-certificates=2020.12.5=ha878542_0
-  - certifi=2019.11.28=py27h8c360ce_1
-  - configparser=3.7.3=py27h8c360ce_2
-  - decorator=4.4.2=py_0
-  - entrypoints=0.3=py27h8c360ce_1001
-  - enum34=1.1.10=py27h8c360ce_1
-  - futures=3.3.0=py27h8c360ce_1
-  - ipykernel=4.8.2=py27_0
-  - ipython=5.8.0=py27_1
-  - ipython_genutils=0.2.0=py27_0
-  - jupyter_client=5.3.4=py27_1
-  - jupyter_core=4.6.3=py27h8c360ce_1
-  - ld_impl_linux-64=2.35.1=hea4e1c9_2
-  - libffi=3.2.1=he1b5a44_1007
-  - libgcc-ng=9.3.0=h2828fa1_18
-  - libgomp=9.3.0=h2828fa1_18
-  - libsodium=1.0.17=h516909a_0
-  - libstdcxx-ng=9.3.0=h6de172a_18
-  - ncurses=6.2=h58526e2_4
-  - openssl=1.1.1j=h7f98852_0
-  - pathlib2=2.3.5=py27h8c360ce_1
-  - pexpect=4.8.0=py27h8c360ce_1
-  - pickleshare=0.7.5=py27h8c360ce_1001
-  - pip=20.1.1=pyh9f0ad1d_0
-  - prompt_toolkit=1.0.15=py27_0
-  - ptyprocess=0.7.0=pyhd3deb0d_0
-  - pygments=2.5.2=py_0
-  - python=2.7.15=h5a48372_1011_cpython
-  - python-dateutil=2.8.1=py_0
-  - python_abi=2.7=1_cp27mu
-  - pyzmq=19.0.0=py27h76efe43_1
-  - readline=8.0=he28a2e2_2
-  - scandir=1.10.0=py27hdf8410d_1
-  - setuptools=44.0.0=py27_0
-  - simplegeneric=0.8.1=py27_0
-  - singledispatch=3.6.0=pyh44b312d_0
-  - six=1.15.0=pyh9f0ad1d_0
-  - sqlite=3.34.0=h74cdb3f_0
-  - tk=8.6.10=hed695b0_1
-  - tornado=5.1.1=py27h14c3975_1000
-  - traitlets=4.3.3=py27h8c360ce_1
-  - wcwidth=0.1.9=pyh9f0ad1d_0
-  - wheel=0.36.2=pyhd3deb0d_0
-  - zeromq=4.3.2=he1b5a44_2
-  - zlib=1.2.11=h516909a_1010
-prefix: /opt/conda/envs/r2d
+# Frozen on 2021-03-03 10:12:18 UTC
+# platform: linux-64
+# env_hash: 1e9c09ca594c43a1f5b3a5b3ad169bfcecd1b38149ac1c7d277d117d8b44a6b6
+@EXPLICIT
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+https://conda.anaconda.org/conda-forge/linux-64/ld_impl_linux-64-2.35.1-hea4e1c9_2.tar.bz2#83610dba766a186bdc7a116053b782a4
+https://conda.anaconda.org/conda-forge/linux-64/libstdcxx-ng-9.3.0-h6de172a_18.tar.bz2#2f03cd1e5c966d4af5822c7ae089ab03
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+https://conda.anaconda.org/conda-forge/linux-64/backports-1.0-py27_1.tar.bz2#eda57aeca994883cc314e03b71968668
+https://conda.anaconda.org/conda-forge/linux-64/backports.shutil_get_terminal_size-1.0.0-py27_1.tar.bz2#539974750142343a3944ac010e475cb6
+https://conda.anaconda.org/conda-forge/linux-64/backports_abc-0.5-py27_0.tar.bz2#125cc4f050a230395060f1f1349ec18e
+https://conda.anaconda.org/conda-forge/noarch/decorator-4.4.2-py_0.tar.bz2#d2eabb9cabd212e1ec6a9463bd846243
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+https://conda.anaconda.org/conda-forge/noarch/ptyprocess-0.7.0-pyhd3deb0d_0.tar.bz2#359eeb6536da0e687af562ed265ec263
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+https://conda.anaconda.org/conda-forge/linux-64/simplegeneric-0.8.1-py27_0.tar.bz2#f1db3b1ec8ca72f3b1a26331b386aa51
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+https://conda.anaconda.org/conda-forge/noarch/wcwidth-0.1.9-pyh9f0ad1d_0.tar.bz2#ef10a99c7570762fa2a69218c171dbc8
+https://conda.anaconda.org/conda-forge/linux-64/certifi-2019.11.28-py27h8c360ce_1.tar.bz2#a345324a2547908c1f9ca4b65d93f5ba
+https://conda.anaconda.org/conda-forge/linux-64/configparser-3.7.3-py27h8c360ce_2.tar.bz2#fce87da76335c7274cb858745fded401
+https://conda.anaconda.org/conda-forge/linux-64/enum34-1.1.10-py27h8c360ce_1.tar.bz2#0af4ab7b9189611125ba54d99163f58d
+https://conda.anaconda.org/conda-forge/linux-64/futures-3.3.0-py27h8c360ce_1.tar.bz2#2689f3fc54d3987298828719b0244005
+https://conda.anaconda.org/conda-forge/linux-64/pexpect-4.8.0-py27h8c360ce_1.tar.bz2#e772596cb72ea97421227a22aefba64a
+https://conda.anaconda.org/conda-forge/noarch/python-dateutil-2.8.1-py_0.tar.bz2#0d0150ed9c2d25817f5324108d3f7571
+https://conda.anaconda.org/conda-forge/linux-64/pyzmq-19.0.0-py27h76efe43_1.tar.bz2#0f578fd2966e4b2b910ffb3d39951645
+https://conda.anaconda.org/conda-forge/linux-64/scandir-1.10.0-py27hdf8410d_1.tar.bz2#bfaf4b51772c5904b696ce7d68731397
+https://conda.anaconda.org/conda-forge/noarch/singledispatch-3.6.1-pyh44b312d_0.tar.bz2#97dbbff78f872e5eb30a57c050cc4bba
+https://conda.anaconda.org/conda-forge/linux-64/entrypoints-0.3-py27h8c360ce_1001.tar.bz2#60366d5225a69edbfcc71572b099ddde
+https://conda.anaconda.org/conda-forge/linux-64/pathlib2-2.3.5-py27h8c360ce_1.tar.bz2#5334600914183898c9e7610d894e49e3
+https://conda.anaconda.org/conda-forge/linux-64/setuptools-44.0.0-py27_0.tar.bz2#a1dcb0ca393c777d0611faf5b86602be
+https://conda.anaconda.org/conda-forge/linux-64/tornado-5.1.1-py27h14c3975_1000.tar.bz2#adf3de0f4bc56b631b63e5b5dc0a8886
+https://conda.anaconda.org/conda-forge/linux-64/traitlets-4.3.3-py27h8c360ce_1.tar.bz2#1e13e5ecf3cab787df71dc0c77563dce
+https://conda.anaconda.org/conda-forge/linux-64/jupyter_core-4.6.3-py27h8c360ce_1.tar.bz2#1ea743b19d7f4e758b0a385fe9a1ef4b
+https://conda.anaconda.org/conda-forge/linux-64/pickleshare-0.7.5-py27h8c360ce_1001.tar.bz2#93586047c34842372ae2c1ed5fc9edbf
+https://conda.anaconda.org/conda-forge/noarch/pygments-2.5.2-py_0.tar.bz2#c48719b941c60b26add57de2b014ef96
+https://conda.anaconda.org/conda-forge/linux-64/jupyter_client-5.3.4-py27_1.tar.bz2#ec6099141189dfae14367478d3e96fa9
+https://conda.anaconda.org/conda-forge/linux-64/prompt_toolkit-1.0.15-py27_0.tar.bz2#e64d8ff5a16afcea0dff046bc837f6db
+https://conda.anaconda.org/conda-forge/linux-64/ipython-5.8.0-py27_1.tar.bz2#b95b11ff25dde76c6fa0c5620a8e90ad
+https://conda.anaconda.org/conda-forge/linux-64/ipykernel-4.8.2-py27_0.tar.bz2#18141b1342f87e1607c5b389c2c12a81
diff --git a/repo2docker/buildpacks/conda/environment.py-2.7.yml b/repo2docker/buildpacks/conda/environment.py-2.7.yml
index cbe900e2..234533a3 100644
--- a/repo2docker/buildpacks/conda/environment.py-2.7.yml
+++ b/repo2docker/buildpacks/conda/environment.py-2.7.yml
@@ -1,3 +1,5 @@
+channels:
+- conda-forge
 dependencies:
 - python=2.7.*
 - ipykernel==4.8.2
diff --git a/repo2docker/buildpacks/conda/environment.py-3.6.frozen.yml b/repo2docker/buildpacks/conda/environment.py-3.6.frozen.yml
index 58a285d9..3dc55515 100644
--- a/repo2docker/buildpacks/conda/environment.py-3.6.frozen.yml
+++ b/repo2docker/buildpacks/conda/environment.py-3.6.frozen.yml
@@ -1,136 +1,133 @@
 # AUTO GENERATED FROM environment.py-3.6.yml, DO NOT MANUALLY MODIFY
-# Frozen on 2021-02-22 12:25:15 UTC
-name: r2d
-channels:
-  - conda-forge
-  - defaults
-  - conda-forge/label/broken
-dependencies:
-  - _libgcc_mutex=0.1=conda_forge
-  - _openmp_mutex=4.5=1_gnu
-  - alembic=1.5.5=pyhd8ed1ab_0
-  - anyio=2.1.0=py36h5fab9bb_0
-  - argon2-cffi=20.1.0=py36h8f6f2f9_2
-  - async_generator=1.10=py_0
-  - attrs=20.3.0=pyhd3deb0d_0
-  - babel=2.9.0=pyhd3deb0d_0
-  - backcall=0.2.0=pyh9f0ad1d_0
-  - backports=1.0=py36_1
-  - backports.functools_lru_cache=1.6.1=py_0
-  - bleach=3.3.0=pyh44b312d_0
-  - blinker=1.4=py_1
-  - brotlipy=0.7.0=py36he6145b8_1001
-  - c-ares=1.17.1=h36c2ea0_0
-  - ca-certificates=2020.12.5=ha878542_0
-  - certifi=2020.12.5=py36h5fab9bb_1
-  - certipy=0.1.3=py_0
-  - cffi=1.14.5=py36hc120d54_0
-  - chardet=4.0.0=py36h5fab9bb_1
-  - contextvars=2.4=py_0
-  - cryptography=3.4.4=py36hc39840e_0
-  - dataclasses=0.7=py36_0
-  - decorator=4.4.2=py_0
-  - defusedxml=0.6.0=py_0
-  - entrypoints=0.3=py36h9f0ad1d_1002
-  - idna=2.10=pyh9f0ad1d_0
-  - immutables=0.15=py36h8f6f2f9_0
-  - importlib-metadata=3.4.0=py36h5fab9bb_0
-  - importlib_metadata=3.4.0=hd8ed1ab_0
-  - ipykernel=5.5.0=py36he448a4c_1
-  - ipython=7.16.1=py36he448a4c_2
-  - ipython_genutils=0.2.0=py36_0
-  - ipywidgets=7.6.3=pyhd3deb0d_0
-  - jedi=0.17.2=py36h9f0ad1d_1
-  - jinja2=2.11.3=pyh44b312d_0
-  - json5=0.9.5=pyh9f0ad1d_0
-  - jsonschema=3.2.0=py36h9f0ad1d_1
-  - jupyter-offlinenotebook=0.2.1=pyhd8ed1ab_0
-  - jupyter-resource-usage=0.5.1=pyhd8ed1ab_0
-  - jupyter_client=6.1.11=pyhd8ed1ab_1
-  - jupyter_core=4.7.1=py36h5fab9bb_0
-  - jupyter_server=1.4.0=py36h5fab9bb_0
-  - jupyter_telemetry=0.1.0=pyhd8ed1ab_1
-  - jupyterhub-base=1.3.0=py36h5fab9bb_0
-  - jupyterhub-singleuser=1.3.0=py36h5fab9bb_0
-  - jupyterlab=3.0.7=pyhd8ed1ab_0
-  - jupyterlab_pygments=0.1.2=pyh9f0ad1d_0
-  - jupyterlab_server=2.3.0=pyhd8ed1ab_0
-  - jupyterlab_widgets=1.0.0=pyhd8ed1ab_1
-  - krb5=1.17.2=h926e7f8_0
-  - ld_impl_linux-64=2.35.1=hea4e1c9_2
-  - libcurl=7.71.1=hcdd3856_8
-  - libedit=3.1.20191231=he28a2e2_2
-  - libev=4.33=h516909a_1
-  - libffi=3.3=h58526e2_2
-  - libgcc-ng=9.3.0=h2828fa1_18
-  - libgomp=9.3.0=h2828fa1_18
-  - libnghttp2=1.43.0=h812cca2_0
-  - libsodium=1.0.18=h516909a_1
-  - libssh2=1.9.0=hab1572f_5
-  - libstdcxx-ng=9.3.0=h6de172a_18
-  - mako=1.1.4=pyh44b312d_0
-  - markupsafe=1.1.1=py36h8f6f2f9_3
-  - mistune=0.8.4=py36h8f6f2f9_1003
-  - nbclassic=0.2.6=pyhd8ed1ab_0
-  - nbclient=0.5.2=pyhd8ed1ab_0
-  - nbconvert=6.0.7=py36h5fab9bb_3
-  - nbformat=5.1.2=pyhd8ed1ab_1
-  - ncurses=6.2=h58526e2_4
-  - nest-asyncio=1.4.3=pyhd8ed1ab_0
-  - notebook=6.2.0=py36h5fab9bb_0
-  - nteract_on_jupyter=2.1.3=py_0
-  - oauthlib=3.0.1=py_0
-  - openssl=1.1.1j=h7f98852_0
-  - packaging=20.9=pyh44b312d_0
-  - pamela=1.0.0=py_0
-  - pandoc=2.11.4=h7f98852_0
-  - pandocfilters=1.4.2=py36_0
-  - parso=0.7.1=pyh9f0ad1d_0
-  - pexpect=4.8.0=py36h9f0ad1d_1
-  - pickleshare=0.7.5=py36h9f0ad1d_1002
-  - pip=21.0.1=pyhd8ed1ab_0
-  - prometheus_client=0.9.0=pyhd3deb0d_0
-  - prompt-toolkit=3.0.16=pyha770c72_0
-  - psutil=5.8.0=py36h8f6f2f9_1
-  - ptyprocess=0.7.0=pyhd3deb0d_0
-  - pycparser=2.20=pyh9f0ad1d_2
-  - pycurl=7.43.0.6=py36h66a4f8d_1
-  - pygments=2.8.0=pyhd8ed1ab_0
-  - pyjwt=2.0.1=pyhd8ed1ab_0
-  - pyopenssl=20.0.1=pyhd8ed1ab_0
-  - pyparsing=2.4.7=pyh9f0ad1d_0
-  - pyrsistent=0.17.3=py36h8f6f2f9_2
-  - pysocks=1.7.1=py36h5fab9bb_3
-  - python=3.6.13=hffdb5ce_0_cpython
-  - python-dateutil=2.8.1=py_0
-  - python-editor=1.0.4=py_0
-  - python-json-logger=2.0.1=pyh9f0ad1d_0
-  - python_abi=3.6=1_cp36m
-  - pytz=2021.1=pyhd8ed1ab_0
-  - pyzmq=22.0.3=py36h81c33ee_0
-  - readline=8.0=he28a2e2_2
-  - requests=2.25.1=pyhd3deb0d_0
-  - ruamel.yaml=0.16.12=py36h8f6f2f9_2
-  - ruamel.yaml.clib=0.2.2=py36h8f6f2f9_2
-  - send2trash=1.5.0=py_0
-  - setuptools=49.6.0=py36h5fab9bb_3
-  - six=1.15.0=pyh9f0ad1d_0
-  - sniffio=1.2.0=py36h5fab9bb_1
-  - sqlalchemy=1.3.23=py36h8f6f2f9_0
-  - sqlite=3.34.0=h74cdb3f_0
-  - terminado=0.9.2=py36h5fab9bb_0
-  - testpath=0.4.4=py_0
-  - tk=8.6.10=hed695b0_1
-  - tornado=6.1=py36h8f6f2f9_1
-  - traitlets=4.3.3=py36h9f0ad1d_1
-  - typing_extensions=3.7.4.3=py_0
-  - urllib3=1.26.3=pyhd8ed1ab_0
-  - wcwidth=0.2.5=pyh9f0ad1d_2
-  - webencodings=0.5.1=py_1
-  - wheel=0.36.2=pyhd3deb0d_0
-  - widgetsnbextension=3.5.1=py36h9f0ad1d_4
-  - xz=5.2.5=h516909a_1
-  - zeromq=4.3.4=h9c3ff4c_0
-  - zipp=3.4.0=py_0
-  - zlib=1.2.11=h516909a_1010
-prefix: /opt/conda/envs/r2d
+# Frozen on 2021-03-03 10:12:35 UTC
+# platform: linux-64
+# env_hash: a51a09ac3f6f3df1262919a6dc087f284a027e50b70f065faad341a1e4a6d956
+@EXPLICIT
+https://conda.anaconda.org/conda-forge/linux-64/_libgcc_mutex-0.1-conda_forge.tar.bz2#d7c89558ba9fa0495403155b64376d81
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+https://conda.anaconda.org/conda-forge/linux-64/libstdcxx-ng-9.3.0-h6de172a_18.tar.bz2#2f03cd1e5c966d4af5822c7ae089ab03
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+https://conda.anaconda.org/conda-forge/linux-64/libgomp-9.3.0-h2828fa1_18.tar.bz2#fc7a2a7e6a741c8afdd764715ac7039d
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+https://conda.anaconda.org/conda-forge/linux-64/expat-2.2.10-h9c3ff4c_0.tar.bz2#c924bc4e7ae49118f6c97bd4357fed0e
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+https://conda.anaconda.org/conda-forge/linux-64/libffi-3.3-h58526e2_2.tar.bz2#665369991d8dd290ac5ee92fce3e6bf5
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+https://conda.anaconda.org/conda-forge/linux-64/ncurses-6.2-h58526e2_4.tar.bz2#509f2a21c4a09214cd737a480dfd80c9
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diff --git a/repo2docker/buildpacks/conda/environment.py-3.6.yml b/repo2docker/buildpacks/conda/environment.py-3.6.yml
index acae085b..607fa236 100644
--- a/repo2docker/buildpacks/conda/environment.py-3.6.yml
+++ b/repo2docker/buildpacks/conda/environment.py-3.6.yml
@@ -1,5 +1,7 @@
 # AUTO GENERATED FROM environment.yml, DO NOT MANUALLY MODIFY
-# Generated on 2021-02-22 12:25:15 UTC
+# Generated on 2021-03-03 10:12:18 UTC
+channels:
+- conda-forge
 dependencies:
 - python=3.6.*
 - ipywidgets==7.6.3
diff --git a/repo2docker/buildpacks/conda/environment.py-3.7.frozen.yml b/repo2docker/buildpacks/conda/environment.py-3.7.frozen.yml
index daca3f21..cdd0de11 100644
--- a/repo2docker/buildpacks/conda/environment.py-3.7.frozen.yml
+++ b/repo2docker/buildpacks/conda/environment.py-3.7.frozen.yml
@@ -1,133 +1,127 @@
 # AUTO GENERATED FROM environment.py-3.7.yml, DO NOT MANUALLY MODIFY
-# Frozen on 2021-02-22 12:26:46 UTC
-name: r2d
-channels:
-  - conda-forge
-  - defaults
-  - conda-forge/label/broken
-dependencies:
-  - _libgcc_mutex=0.1=conda_forge
-  - _openmp_mutex=4.5=1_gnu
-  - alembic=1.5.5=pyhd8ed1ab_0
-  - anyio=2.1.0=py37h89c1867_0
-  - argon2-cffi=20.1.0=py37h8f50634_2
-  - async_generator=1.10=py_0
-  - attrs=20.3.0=pyhd3deb0d_0
-  - babel=2.9.0=pyhd3deb0d_0
-  - backcall=0.2.0=pyh9f0ad1d_0
-  - backports=1.0=py_2
-  - backports.functools_lru_cache=1.6.1=py_0
-  - bleach=3.3.0=pyh44b312d_0
-  - blinker=1.4=py_1
-  - brotlipy=0.7.0=py37hb5d75c8_1001
-  - c-ares=1.17.1=h36c2ea0_0
-  - ca-certificates=2020.12.5=ha878542_0
-  - certifi=2020.12.5=py37h89c1867_1
-  - certipy=0.1.3=py_0
-  - cffi=1.14.5=py37hc58025e_0
-  - chardet=4.0.0=py37h89c1867_1
-  - cryptography=3.4.4=py37hf1a17b8_0
-  - decorator=4.4.2=py_0
-  - defusedxml=0.6.0=py_0
-  - entrypoints=0.3=py37hc8dfbb8_1002
-  - idna=2.10=pyh9f0ad1d_0
-  - importlib-metadata=3.4.0=py37h89c1867_0
-  - importlib_metadata=3.4.0=hd8ed1ab_0
-  - ipykernel=5.5.0=py37h888b3d9_1
-  - ipython=7.20.0=py37h888b3d9_2
-  - ipython_genutils=0.2.0=py_1
-  - ipywidgets=7.6.3=pyhd3deb0d_0
-  - jedi=0.18.0=py37h89c1867_2
-  - jinja2=2.11.3=pyh44b312d_0
-  - json5=0.9.5=pyh9f0ad1d_0
-  - jsonschema=3.2.0=py37hc8dfbb8_1
-  - jupyter-offlinenotebook=0.2.1=pyhd8ed1ab_0
-  - jupyter-resource-usage=0.5.1=pyhd8ed1ab_0
-  - jupyter_client=6.1.11=pyhd8ed1ab_1
-  - jupyter_core=4.7.1=py37h89c1867_0
-  - jupyter_server=1.4.0=py37h89c1867_0
-  - jupyter_telemetry=0.1.0=pyhd8ed1ab_1
-  - jupyterhub-base=1.3.0=py37h89c1867_0
-  - jupyterhub-singleuser=1.3.0=py37h89c1867_0
-  - jupyterlab=3.0.7=pyhd8ed1ab_0
-  - jupyterlab_pygments=0.1.2=pyh9f0ad1d_0
-  - jupyterlab_server=2.3.0=pyhd8ed1ab_0
-  - jupyterlab_widgets=1.0.0=pyhd8ed1ab_1
-  - krb5=1.17.2=h926e7f8_0
-  - ld_impl_linux-64=2.35.1=hea4e1c9_2
-  - libcurl=7.71.1=hcdd3856_8
-  - libedit=3.1.20191231=he28a2e2_2
-  - libev=4.33=h516909a_1
-  - libffi=3.3=h58526e2_2
-  - libgcc-ng=9.3.0=h2828fa1_18
-  - libgomp=9.3.0=h2828fa1_18
-  - libnghttp2=1.43.0=h812cca2_0
-  - libsodium=1.0.18=h516909a_1
-  - libssh2=1.9.0=hab1572f_5
-  - libstdcxx-ng=9.3.0=h6de172a_18
-  - mako=1.1.4=pyh44b312d_0
-  - markupsafe=1.1.1=py37h5e8e339_3
-  - mistune=0.8.4=py37h5e8e339_1003
-  - nbclassic=0.2.6=pyhd8ed1ab_0
-  - nbclient=0.5.2=pyhd8ed1ab_0
-  - nbconvert=6.0.7=py37h89c1867_3
-  - nbformat=5.1.2=pyhd8ed1ab_1
-  - ncurses=6.2=h58526e2_4
-  - nest-asyncio=1.4.3=pyhd8ed1ab_0
-  - notebook=6.2.0=py37h89c1867_0
-  - nteract_on_jupyter=2.1.3=py_0
-  - oauthlib=3.0.1=py_0
-  - openssl=1.1.1j=h7f98852_0
-  - packaging=20.9=pyh44b312d_0
-  - pamela=1.0.0=py_0
-  - pandoc=2.11.4=h7f98852_0
-  - pandocfilters=1.4.2=py_1
-  - parso=0.8.1=pyhd8ed1ab_0
-  - pexpect=4.8.0=py37hc8dfbb8_1
-  - pickleshare=0.7.5=py37hc8dfbb8_1002
-  - pip=21.0.1=pyhd8ed1ab_0
-  - prometheus_client=0.9.0=pyhd3deb0d_0
-  - prompt-toolkit=3.0.16=pyha770c72_0
-  - psutil=5.8.0=py37h5e8e339_1
-  - ptyprocess=0.7.0=pyhd3deb0d_0
-  - pycparser=2.20=pyh9f0ad1d_2
-  - pycurl=7.43.0.6=py37h88a64d2_1
-  - pygments=2.8.0=pyhd8ed1ab_0
-  - pyjwt=2.0.1=pyhd8ed1ab_0
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-  - pyparsing=2.4.7=pyh9f0ad1d_0
-  - pyrsistent=0.17.3=py37h5e8e339_2
-  - pysocks=1.7.1=py37h89c1867_3
-  - python=3.7.10=hffdb5ce_100_cpython
-  - python-dateutil=2.8.1=py_0
-  - python-editor=1.0.4=py_0
-  - python-json-logger=2.0.1=pyh9f0ad1d_0
-  - python_abi=3.7=1_cp37m
-  - pytz=2021.1=pyhd8ed1ab_0
-  - pyzmq=22.0.3=py37h499b945_0
-  - readline=8.0=he28a2e2_2
-  - requests=2.25.1=pyhd3deb0d_0
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-  - ruamel.yaml.clib=0.2.2=py37h5e8e339_2
-  - send2trash=1.5.0=py_0
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-  - sqlalchemy=1.3.23=py37h5e8e339_0
-  - sqlite=3.34.0=h74cdb3f_0
-  - terminado=0.9.2=py37h89c1867_0
-  - testpath=0.4.4=py_0
-  - tk=8.6.10=hed695b0_1
-  - tornado=6.1=py37h5e8e339_1
-  - traitlets=5.0.5=py_0
-  - typing_extensions=3.7.4.3=py_0
-  - urllib3=1.26.3=pyhd8ed1ab_0
-  - wcwidth=0.2.5=pyh9f0ad1d_2
-  - webencodings=0.5.1=py_1
-  - wheel=0.36.2=pyhd3deb0d_0
-  - widgetsnbextension=3.5.1=py37hc8dfbb8_4
-  - xz=5.2.5=h516909a_1
-  - zeromq=4.3.4=h9c3ff4c_0
-  - zipp=3.4.0=py_0
-  - zlib=1.2.11=h516909a_1010
-prefix: /opt/conda/envs/r2d
+# Frozen on 2021-03-03 10:12:57 UTC
+# platform: linux-64
+# env_hash: 17b507a3f9305647319e6a222a3e371ef047067b01f5448b440895009416cc75
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+https://conda.anaconda.org/conda-forge/noarch/nteract_on_jupyter-2.1.3-py_0.tar.bz2#1430ccd983ae6b161e2fbf4377965f7a
+https://conda.anaconda.org/conda-forge/linux-64/widgetsnbextension-3.5.1-py37hc8dfbb8_4.tar.bz2#aa60a29b1664babd0f1f5ce4f11560f6
+https://conda.anaconda.org/conda-forge/noarch/ipywidgets-7.6.3-pyhd3deb0d_0.tar.bz2#536a9ed6d9e740f2b83d1a3c388e4388
+https://conda.anaconda.org/conda-forge/noarch/jupyterlab-3.0.7-pyhd8ed1ab_0.tar.bz2#127cb0160dcd6efedfc1614a4a36fdcc
diff --git a/repo2docker/buildpacks/conda/environment.py-3.7.yml b/repo2docker/buildpacks/conda/environment.py-3.7.yml
index de07e850..8ad75f97 100644
--- a/repo2docker/buildpacks/conda/environment.py-3.7.yml
+++ b/repo2docker/buildpacks/conda/environment.py-3.7.yml
@@ -1,5 +1,7 @@
 # AUTO GENERATED FROM environment.yml, DO NOT MANUALLY MODIFY
-# Generated on 2021-02-22 12:26:46 UTC
+# Generated on 2021-03-03 10:12:35 UTC
+channels:
+- conda-forge
 dependencies:
 - python=3.7.*
 - ipywidgets==7.6.3
diff --git a/repo2docker/buildpacks/conda/environment.py-3.8.frozen.yml b/repo2docker/buildpacks/conda/environment.py-3.8.frozen.yml
index 9457d0ed..fcc2cd0b 100644
--- a/repo2docker/buildpacks/conda/environment.py-3.8.frozen.yml
+++ b/repo2docker/buildpacks/conda/environment.py-3.8.frozen.yml
@@ -1,132 +1,126 @@
 # AUTO GENERATED FROM environment.py-3.8.yml, DO NOT MANUALLY MODIFY
-# Frozen on 2021-02-22 12:22:38 UTC
-name: r2d
-channels:
-  - conda-forge
-  - defaults
-  - conda-forge/label/broken
-dependencies:
-  - _libgcc_mutex=0.1=conda_forge
-  - _openmp_mutex=4.5=1_gnu
-  - alembic=1.5.5=pyhd8ed1ab_0
-  - anyio=2.1.0=py38h578d9bd_0
-  - argon2-cffi=20.1.0=py38h497a2fe_2
-  - async_generator=1.10=py_0
-  - attrs=20.3.0=pyhd3deb0d_0
-  - babel=2.9.0=pyhd3deb0d_0
-  - backcall=0.2.0=pyh9f0ad1d_0
-  - backports=1.0=py_2
-  - backports.functools_lru_cache=1.6.1=py_0
-  - bleach=3.3.0=pyh44b312d_0
-  - blinker=1.4=py_1
-  - brotlipy=0.7.0=py38h497a2fe_1001
-  - c-ares=1.17.1=h36c2ea0_0
-  - ca-certificates=2020.12.5=ha878542_0
-  - certifi=2020.12.5=py38h578d9bd_1
-  - certipy=0.1.3=py_0
-  - cffi=1.14.5=py38ha65f79e_0
-  - chardet=4.0.0=py38h578d9bd_1
-  - cryptography=3.4.4=py38h3e25421_0
-  - decorator=4.4.2=py_0
-  - defusedxml=0.6.0=py_0
-  - entrypoints=0.3=py38h32f6830_1002
-  - idna=2.10=pyh9f0ad1d_0
-  - importlib-metadata=3.4.0=py38h578d9bd_0
-  - importlib_metadata=3.4.0=hd8ed1ab_0
-  - ipykernel=5.5.0=py38h81c977d_1
-  - ipython=7.20.0=py38h81c977d_2
-  - ipython_genutils=0.2.0=py_1
-  - ipywidgets=7.6.3=pyhd3deb0d_0
-  - jedi=0.18.0=py38h578d9bd_2
-  - jinja2=2.11.3=pyh44b312d_0
-  - json5=0.9.5=pyh9f0ad1d_0
-  - jsonschema=3.2.0=py38h32f6830_1
-  - jupyter-offlinenotebook=0.2.1=pyhd8ed1ab_0
-  - jupyter-resource-usage=0.5.1=pyhd8ed1ab_0
-  - jupyter_client=6.1.11=pyhd8ed1ab_1
-  - jupyter_core=4.7.1=py38h578d9bd_0
-  - jupyter_server=1.4.0=py38h578d9bd_0
-  - jupyter_telemetry=0.1.0=pyhd8ed1ab_1
-  - jupyterhub-base=1.3.0=py38h578d9bd_0
-  - jupyterhub-singleuser=1.3.0=py38h578d9bd_0
-  - jupyterlab=3.0.7=pyhd8ed1ab_0
-  - jupyterlab_pygments=0.1.2=pyh9f0ad1d_0
-  - jupyterlab_server=2.3.0=pyhd8ed1ab_0
-  - jupyterlab_widgets=1.0.0=pyhd8ed1ab_1
-  - krb5=1.17.2=h926e7f8_0
-  - ld_impl_linux-64=2.35.1=hea4e1c9_2
-  - libcurl=7.71.1=hcdd3856_8
-  - libedit=3.1.20191231=he28a2e2_2
-  - libev=4.33=h516909a_1
-  - libffi=3.3=h58526e2_2
-  - libgcc-ng=9.3.0=h2828fa1_18
-  - libgomp=9.3.0=h2828fa1_18
-  - libnghttp2=1.43.0=h812cca2_0
-  - libsodium=1.0.18=h516909a_1
-  - libssh2=1.9.0=hab1572f_5
-  - libstdcxx-ng=9.3.0=h6de172a_18
-  - mako=1.1.4=pyh44b312d_0
-  - markupsafe=1.1.1=py38h497a2fe_3
-  - mistune=0.8.4=py38h497a2fe_1003
-  - nbclassic=0.2.6=pyhd8ed1ab_0
-  - nbclient=0.5.2=pyhd8ed1ab_0
-  - nbconvert=6.0.7=py38h578d9bd_3
-  - nbformat=5.1.2=pyhd8ed1ab_1
-  - ncurses=6.2=h58526e2_4
-  - nest-asyncio=1.4.3=pyhd8ed1ab_0
-  - notebook=6.2.0=py38h578d9bd_0
-  - nteract_on_jupyter=2.1.3=py_0
-  - oauthlib=3.0.1=py_0
-  - openssl=1.1.1j=h7f98852_0
-  - packaging=20.9=pyh44b312d_0
-  - pamela=1.0.0=py_0
-  - pandoc=2.11.4=h7f98852_0
-  - pandocfilters=1.4.2=py_1
-  - parso=0.8.1=pyhd8ed1ab_0
-  - pexpect=4.8.0=py38h32f6830_1
-  - pickleshare=0.7.5=py38h32f6830_1002
-  - pip=21.0.1=pyhd8ed1ab_0
-  - prometheus_client=0.9.0=pyhd3deb0d_0
-  - prompt-toolkit=3.0.16=pyha770c72_0
-  - psutil=5.8.0=py38h497a2fe_1
-  - ptyprocess=0.7.0=pyhd3deb0d_0
-  - pycparser=2.20=pyh9f0ad1d_2
-  - pycurl=7.43.0.6=py38h996a351_1
-  - pygments=2.8.0=pyhd8ed1ab_0
-  - pyjwt=2.0.1=pyhd8ed1ab_0
-  - pyopenssl=20.0.1=pyhd8ed1ab_0
-  - pyparsing=2.4.7=pyh9f0ad1d_0
-  - pyrsistent=0.17.3=py38h497a2fe_2
-  - pysocks=1.7.1=py38h578d9bd_3
-  - python=3.8.8=hffdb5ce_0_cpython
-  - python-dateutil=2.8.1=py_0
-  - python-editor=1.0.4=py_0
-  - python-json-logger=2.0.1=pyh9f0ad1d_0
-  - python_abi=3.8=1_cp38
-  - pytz=2021.1=pyhd8ed1ab_0
-  - pyzmq=22.0.3=py38h3d7ac18_0
-  - readline=8.0=he28a2e2_2
-  - requests=2.25.1=pyhd3deb0d_0
-  - ruamel.yaml=0.16.12=py38h497a2fe_2
-  - ruamel.yaml.clib=0.2.2=py38h497a2fe_2
-  - send2trash=1.5.0=py_0
-  - setuptools=49.6.0=py38h578d9bd_3
-  - six=1.15.0=pyh9f0ad1d_0
-  - sniffio=1.2.0=py38h578d9bd_1
-  - sqlalchemy=1.3.23=py38h497a2fe_0
-  - sqlite=3.34.0=h74cdb3f_0
-  - terminado=0.9.2=py38h578d9bd_0
-  - testpath=0.4.4=py_0
-  - tk=8.6.10=hed695b0_1
-  - tornado=6.1=py38h497a2fe_1
-  - traitlets=5.0.5=py_0
-  - urllib3=1.26.3=pyhd8ed1ab_0
-  - wcwidth=0.2.5=pyh9f0ad1d_2
-  - webencodings=0.5.1=py_1
-  - wheel=0.36.2=pyhd3deb0d_0
-  - widgetsnbextension=3.5.1=py38h578d9bd_4
-  - xz=5.2.5=h516909a_1
-  - zeromq=4.3.4=h9c3ff4c_0
-  - zipp=3.4.0=py_0
-  - zlib=1.2.11=h516909a_1010
-prefix: /opt/conda/envs/r2d
+# Frozen on 2021-03-03 10:13:17 UTC
+# platform: linux-64
+# env_hash: fb94d5147cd77a4e31d2be6f973e33f513d02c1f3b3e0590e60585b99eaf3422
+@EXPLICIT
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+https://conda.anaconda.org/conda-forge/linux-64/libstdcxx-ng-9.3.0-h6de172a_18.tar.bz2#2f03cd1e5c966d4af5822c7ae089ab03
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+https://conda.anaconda.org/conda-forge/noarch/jupyter-offlinenotebook-0.2.1-pyhd8ed1ab_0.tar.bz2#5e0974a4547a2b82667f65a6498c4145
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+https://conda.anaconda.org/conda-forge/linux-64/jupyterhub-singleuser-1.3.0-py38h578d9bd_1.tar.bz2#df8833395e1e93615bcdfdd0e8099f0e
+https://conda.anaconda.org/conda-forge/noarch/nbclassic-0.2.6-pyhd8ed1ab_0.tar.bz2#49be35e31b49012ea91fcd667ebdf4ad
+https://conda.anaconda.org/conda-forge/noarch/nteract_on_jupyter-2.1.3-py_0.tar.bz2#1430ccd983ae6b161e2fbf4377965f7a
+https://conda.anaconda.org/conda-forge/linux-64/widgetsnbextension-3.5.1-py38h578d9bd_4.tar.bz2#beb8a105545382ba138c81c926289b5b
+https://conda.anaconda.org/conda-forge/noarch/ipywidgets-7.6.3-pyhd3deb0d_0.tar.bz2#536a9ed6d9e740f2b83d1a3c388e4388
+https://conda.anaconda.org/conda-forge/noarch/jupyterlab-3.0.7-pyhd8ed1ab_0.tar.bz2#127cb0160dcd6efedfc1614a4a36fdcc
diff --git a/repo2docker/buildpacks/conda/environment.py-3.8.yml b/repo2docker/buildpacks/conda/environment.py-3.8.yml
index c7e8d084..2a4564d8 100644
--- a/repo2docker/buildpacks/conda/environment.py-3.8.yml
+++ b/repo2docker/buildpacks/conda/environment.py-3.8.yml
@@ -1,5 +1,7 @@
 # AUTO GENERATED FROM environment.yml, DO NOT MANUALLY MODIFY
-# Generated on 2021-02-22 12:22:38 UTC
+# Generated on 2021-03-03 10:12:57 UTC
+channels:
+- conda-forge
 dependencies:
 - python=3.8.*
 - ipywidgets==7.6.3
diff --git a/repo2docker/buildpacks/conda/environment.py-3.9.frozen.yml b/repo2docker/buildpacks/conda/environment.py-3.9.frozen.yml
index 0d7513c7..484b350d 100644
--- a/repo2docker/buildpacks/conda/environment.py-3.9.frozen.yml
+++ b/repo2docker/buildpacks/conda/environment.py-3.9.frozen.yml
@@ -1,133 +1,127 @@
 # AUTO GENERATED FROM environment.py-3.9.yml, DO NOT MANUALLY MODIFY
-# Frozen on 2021-02-22 12:28:32 UTC
-name: r2d
-channels:
-  - conda-forge
-  - defaults
-  - conda-forge/label/broken
-dependencies:
-  - _libgcc_mutex=0.1=conda_forge
-  - _openmp_mutex=4.5=1_gnu
-  - alembic=1.5.5=pyhd8ed1ab_0
-  - anyio=2.1.0=py39hf3d152e_0
-  - argon2-cffi=20.1.0=py39hbd71b63_2
-  - async_generator=1.10=py_0
-  - attrs=20.3.0=pyhd3deb0d_0
-  - babel=2.9.0=pyhd3deb0d_0
-  - backcall=0.2.0=pyh9f0ad1d_0
-  - backports=1.0=py_2
-  - backports.functools_lru_cache=1.6.1=py_0
-  - bleach=3.3.0=pyh44b312d_0
-  - blinker=1.4=py_1
-  - brotlipy=0.7.0=py39h3811e60_1001
-  - c-ares=1.17.1=h36c2ea0_0
-  - ca-certificates=2020.12.5=ha878542_0
-  - certifi=2020.12.5=py39hf3d152e_1
-  - certipy=0.1.3=py_0
-  - cffi=1.14.5=py39he32792d_0
-  - chardet=4.0.0=py39hf3d152e_1
-  - cryptography=3.4.4=py39h95dcef6_0
-  - decorator=4.4.2=py_0
-  - defusedxml=0.6.0=py_0
-  - entrypoints=0.3=py39hde42818_1002
-  - idna=2.10=pyh9f0ad1d_0
-  - importlib-metadata=3.4.0=py39hf3d152e_0
-  - importlib_metadata=3.4.0=hd8ed1ab_0
-  - ipykernel=5.5.0=py39hef51801_1
-  - ipython=7.20.0=py39hef51801_2
-  - ipython_genutils=0.2.0=py_1
-  - ipywidgets=7.6.3=pyhd3deb0d_0
-  - jedi=0.18.0=py39hf3d152e_2
-  - jinja2=2.11.3=pyh44b312d_0
-  - json5=0.9.5=pyh9f0ad1d_0
-  - jsonschema=3.2.0=py_2
-  - jupyter-offlinenotebook=0.2.1=pyhd8ed1ab_0
-  - jupyter-resource-usage=0.5.1=pyhd8ed1ab_0
-  - jupyter_client=6.1.11=pyhd8ed1ab_1
-  - jupyter_core=4.7.1=py39hf3d152e_0
-  - jupyter_server=1.4.0=py39hf3d152e_0
-  - jupyter_telemetry=0.1.0=pyhd8ed1ab_1
-  - jupyterhub-base=1.3.0=py39hf3d152e_0
-  - jupyterhub-singleuser=1.3.0=py39hf3d152e_0
-  - jupyterlab=3.0.7=pyhd8ed1ab_0
-  - jupyterlab_pygments=0.1.2=pyh9f0ad1d_0
-  - jupyterlab_server=2.3.0=pyhd8ed1ab_0
-  - jupyterlab_widgets=1.0.0=pyhd8ed1ab_1
-  - krb5=1.17.2=h926e7f8_0
-  - ld_impl_linux-64=2.35.1=hea4e1c9_2
-  - libcurl=7.71.1=hcdd3856_8
-  - libedit=3.1.20191231=he28a2e2_2
-  - libev=4.33=h516909a_1
-  - libffi=3.3=h58526e2_2
-  - libgcc-ng=9.3.0=h2828fa1_18
-  - libgomp=9.3.0=h2828fa1_18
-  - libnghttp2=1.43.0=h812cca2_0
-  - libsodium=1.0.18=h516909a_1
-  - libssh2=1.9.0=hab1572f_5
-  - libstdcxx-ng=9.3.0=h6de172a_18
-  - mako=1.1.4=pyh44b312d_0
-  - markupsafe=1.1.1=py39h3811e60_3
-  - mistune=0.8.4=py39h3811e60_1003
-  - nbclassic=0.2.6=pyhd8ed1ab_0
-  - nbclient=0.5.2=pyhd8ed1ab_0
-  - nbconvert=6.0.7=py39hf3d152e_3
-  - nbformat=5.1.2=pyhd8ed1ab_1
-  - ncurses=6.2=h58526e2_4
-  - nest-asyncio=1.4.3=pyhd8ed1ab_0
-  - notebook=6.2.0=py39hf3d152e_0
-  - nteract_on_jupyter=2.1.3=py_0
-  - oauthlib=3.0.1=py_0
-  - openssl=1.1.1j=h7f98852_0
-  - packaging=20.9=pyh44b312d_0
-  - pamela=1.0.0=py_0
-  - pandoc=2.11.4=h7f98852_0
-  - pandocfilters=1.4.2=py_1
-  - parso=0.8.1=pyhd8ed1ab_0
-  - pexpect=4.8.0=pyh9f0ad1d_2
-  - pickleshare=0.7.5=py39hde42818_1002
-  - pip=21.0.1=pyhd8ed1ab_0
-  - prometheus_client=0.9.0=pyhd3deb0d_0
-  - prompt-toolkit=3.0.16=pyha770c72_0
-  - psutil=5.8.0=py39h3811e60_1
-  - ptyprocess=0.7.0=pyhd3deb0d_0
-  - pycparser=2.20=pyh9f0ad1d_2
-  - pycurl=7.43.0.6=py39h72e3413_1
-  - pygments=2.8.0=pyhd8ed1ab_0
-  - pyjwt=2.0.1=pyhd8ed1ab_0
-  - pyopenssl=20.0.1=pyhd8ed1ab_0
-  - pyparsing=2.4.7=pyh9f0ad1d_0
-  - pyrsistent=0.17.3=py39h3811e60_2
-  - pysocks=1.7.1=py39hf3d152e_3
-  - python=3.9.2=hffdb5ce_0_cpython
-  - python-dateutil=2.8.1=py_0
-  - python-editor=1.0.4=py_0
-  - python-json-logger=2.0.1=pyh9f0ad1d_0
-  - python_abi=3.9=1_cp39
-  - pytz=2021.1=pyhd8ed1ab_0
-  - pyzmq=22.0.3=py39hea8fd45_0
-  - readline=8.0=he28a2e2_2
-  - requests=2.25.1=pyhd3deb0d_0
-  - ruamel.yaml=0.16.12=py39h3811e60_2
-  - ruamel.yaml.clib=0.2.2=py39h3811e60_2
-  - send2trash=1.5.0=py_0
-  - setuptools=49.6.0=py39hf3d152e_3
-  - six=1.15.0=pyh9f0ad1d_0
-  - sniffio=1.2.0=py39hf3d152e_1
-  - sqlalchemy=1.3.23=py39h3811e60_0
-  - sqlite=3.34.0=h74cdb3f_0
-  - terminado=0.9.2=py39hf3d152e_0
-  - testpath=0.4.4=py_0
-  - tk=8.6.10=hed695b0_1
-  - tornado=6.1=py39h3811e60_1
-  - traitlets=5.0.5=py_0
-  - tzdata=2021a=he74cb21_0
-  - urllib3=1.26.3=pyhd8ed1ab_0
-  - wcwidth=0.2.5=pyh9f0ad1d_2
-  - webencodings=0.5.1=py_1
-  - wheel=0.36.2=pyhd3deb0d_0
-  - widgetsnbextension=3.5.1=py39hf3d152e_4
-  - xz=5.2.5=h516909a_1
-  - zeromq=4.3.4=h9c3ff4c_0
-  - zipp=3.4.0=py_0
-  - zlib=1.2.11=h516909a_1010
-prefix: /opt/conda/envs/r2d
+# Frozen on 2021-03-03 10:13:36 UTC
+# platform: linux-64
+# env_hash: 2aabd3ffa3a848c0e2cb20cdb37641676f64667b0b7d0924749d1b21469f1fe7
+@EXPLICIT
+https://conda.anaconda.org/conda-forge/linux-64/_libgcc_mutex-0.1-conda_forge.tar.bz2#d7c89558ba9fa0495403155b64376d81
+https://conda.anaconda.org/conda-forge/linux-64/ca-certificates-2020.12.5-ha878542_0.tar.bz2#7eb5d4ffeee663caa1635cd67071bc1b
+https://conda.anaconda.org/conda-forge/linux-64/ld_impl_linux-64-2.35.1-hea4e1c9_2.tar.bz2#83610dba766a186bdc7a116053b782a4
+https://conda.anaconda.org/conda-forge/linux-64/libstdcxx-ng-9.3.0-h6de172a_18.tar.bz2#2f03cd1e5c966d4af5822c7ae089ab03
+https://conda.anaconda.org/conda-forge/linux-64/pandoc-2.11.4-h7f98852_0.tar.bz2#1c827fa4db40e5e92c2619ba8fe30500
+https://conda.anaconda.org/conda-forge/noarch/tzdata-2021a-he74cb21_0.tar.bz2#6f36861f102249fc54861ff9343c3fdd
+https://conda.anaconda.org/conda-forge/linux-64/libgomp-9.3.0-h2828fa1_18.tar.bz2#fc7a2a7e6a741c8afdd764715ac7039d
+https://conda.anaconda.org/conda-forge/linux-64/_openmp_mutex-4.5-1_gnu.tar.bz2#561e277319a41d4f24f5c05a9ef63c04
+https://conda.anaconda.org/conda-forge/linux-64/libgcc-ng-9.3.0-h2828fa1_18.tar.bz2#5a9490c49a3505a6d19bda012cde6ad3
+https://conda.anaconda.org/conda-forge/linux-64/c-ares-1.17.1-h36c2ea0_0.tar.bz2#1aa683618a2df66800d568409d6841d1
+https://conda.anaconda.org/conda-forge/linux-64/libev-4.33-h516909a_1.tar.bz2#6f8720dff19e17ce5d48cfe7f3d2f0a3
+https://conda.anaconda.org/conda-forge/linux-64/libffi-3.3-h58526e2_2.tar.bz2#665369991d8dd290ac5ee92fce3e6bf5
+https://conda.anaconda.org/conda-forge/linux-64/libsodium-1.0.18-h516909a_1.tar.bz2#e1ca1a4b82f7b51b29318f80cebae84a
+https://conda.anaconda.org/conda-forge/linux-64/ncurses-6.2-h58526e2_4.tar.bz2#509f2a21c4a09214cd737a480dfd80c9
+https://conda.anaconda.org/conda-forge/linux-64/openssl-1.1.1j-h7f98852_0.tar.bz2#f91545bee2ac8cf86f1dc53e55a7bb2b
+https://conda.anaconda.org/conda-forge/linux-64/xz-5.2.5-h516909a_1.tar.bz2#33f601066901f3e1a85af3522a8113f9
+https://conda.anaconda.org/conda-forge/linux-64/zlib-1.2.11-h516909a_1010.tar.bz2#339cc5584e6d26bc73a875ba900028c3
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+https://conda.anaconda.org/conda-forge/noarch/ipywidgets-7.6.3-pyhd3deb0d_0.tar.bz2#536a9ed6d9e740f2b83d1a3c388e4388
+https://conda.anaconda.org/conda-forge/noarch/jupyterlab-3.0.7-pyhd8ed1ab_0.tar.bz2#127cb0160dcd6efedfc1614a4a36fdcc
diff --git a/repo2docker/buildpacks/conda/environment.py-3.9.yml b/repo2docker/buildpacks/conda/environment.py-3.9.yml
index 94144d4d..3023c3f2 100644
--- a/repo2docker/buildpacks/conda/environment.py-3.9.yml
+++ b/repo2docker/buildpacks/conda/environment.py-3.9.yml
@@ -1,5 +1,7 @@
 # AUTO GENERATED FROM environment.yml, DO NOT MANUALLY MODIFY
-# Generated on 2021-02-22 12:28:32 UTC
+# Generated on 2021-03-03 10:13:17 UTC
+channels:
+- conda-forge
 dependencies:
 - python=3.9.*
 - ipywidgets==7.6.3

From a2d0329b15271f176167c53d3aacaf617db8737f Mon Sep 17 00:00:00 2001
From: Min RK <benjaminrk@gmail.com>
Date: Wed, 3 Mar 2021 11:59:41 +0100
Subject: [PATCH 3/8] explicitly put pip in the base env

instead of depending on conda's automatic pip dependency for Python,
which is sensitive to configuation
---
 repo2docker/buildpacks/conda/environment.py-2.7.yml | 1 +
 repo2docker/buildpacks/conda/environment.yml        | 1 +
 2 files changed, 2 insertions(+)

diff --git a/repo2docker/buildpacks/conda/environment.py-2.7.yml b/repo2docker/buildpacks/conda/environment.py-2.7.yml
index 234533a3..6ef51ead 100644
--- a/repo2docker/buildpacks/conda/environment.py-2.7.yml
+++ b/repo2docker/buildpacks/conda/environment.py-2.7.yml
@@ -2,5 +2,6 @@ channels:
 - conda-forge
 dependencies:
 - python=2.7.*
+- pip
 - ipykernel==4.8.2
 - wcwidth==0.1.9
diff --git a/repo2docker/buildpacks/conda/environment.yml b/repo2docker/buildpacks/conda/environment.yml
index 26483d77..5acedcb1 100644
--- a/repo2docker/buildpacks/conda/environment.yml
+++ b/repo2docker/buildpacks/conda/environment.yml
@@ -2,6 +2,7 @@ channels:
   - conda-forge
 dependencies:
   - python=3.7
+  - pip
   - ipywidgets==7.6.3
   - jupyter-offlinenotebook==0.2.1
   - jupyter-resource-usage==0.5.1

From 93de3872a45db939b0c81683f00ad80edc74ca35 Mon Sep 17 00:00:00 2001
From: Min RK <benjaminrk@gmail.com>
Date: Wed, 3 Mar 2021 12:03:55 +0100
Subject: [PATCH 4/8] refreeze after adding pip

---
 .../buildpacks/conda/environment.frozen.yml   |   6 +-
 .../conda/environment.py-2.7.frozen.yml       |   6 +-
 .../conda/environment.py-3.6.frozen.yml       | 117 +++++++++---------
 .../buildpacks/conda/environment.py-3.6.yml   |   3 +-
 .../conda/environment.py-3.7.frozen.yml       |   6 +-
 .../buildpacks/conda/environment.py-3.7.yml   |   3 +-
 .../conda/environment.py-3.8.frozen.yml       |   6 +-
 .../buildpacks/conda/environment.py-3.8.yml   |   3 +-
 .../conda/environment.py-3.9.frozen.yml       |   6 +-
 .../buildpacks/conda/environment.py-3.9.yml   |   3 +-
 10 files changed, 86 insertions(+), 73 deletions(-)

diff --git a/repo2docker/buildpacks/conda/environment.frozen.yml b/repo2docker/buildpacks/conda/environment.frozen.yml
index cdd0de11..0418602c 100644
--- a/repo2docker/buildpacks/conda/environment.frozen.yml
+++ b/repo2docker/buildpacks/conda/environment.frozen.yml
@@ -1,7 +1,7 @@
 # AUTO GENERATED FROM environment.py-3.7.yml, DO NOT MANUALLY MODIFY
-# Frozen on 2021-03-03 10:12:57 UTC
+# Frozen on 2021-03-03 11:01:09 UTC
 # platform: linux-64
-# env_hash: 17b507a3f9305647319e6a222a3e371ef047067b01f5448b440895009416cc75
+# env_hash: 0c8bbd1723a38dd480d9b0965600a23fe2863608bb7d09a95be9649702b038ff
 @EXPLICIT
 https://conda.anaconda.org/conda-forge/linux-64/_libgcc_mutex-0.1-conda_forge.tar.bz2#d7c89558ba9fa0495403155b64376d81
 https://conda.anaconda.org/conda-forge/linux-64/ca-certificates-2020.12.5-ha878542_0.tar.bz2#7eb5d4ffeee663caa1635cd67071bc1b
@@ -58,6 +58,7 @@ https://conda.anaconda.org/conda-forge/noarch/six-1.15.0-pyh9f0ad1d_0.tar.bz2#1e
 https://conda.anaconda.org/conda-forge/noarch/testpath-0.4.4-py_0.tar.bz2#3b98fff4d5342bebde2ecaa314f796f9
 https://conda.anaconda.org/conda-forge/noarch/typing_extensions-3.7.4.3-py_0.tar.bz2#12b96e382730541a4b332420227055ae
 https://conda.anaconda.org/conda-forge/noarch/webencodings-0.5.1-py_1.tar.bz2#3563be4c5611a44210d9ba0c16113136
+https://conda.anaconda.org/conda-forge/noarch/wheel-0.36.2-pyhd3deb0d_0.tar.bz2#768bfbe026426d0e76b377997d1f2b98
 https://conda.anaconda.org/conda-forge/noarch/zipp-3.4.0-py_0.tar.bz2#0df927d2e46244cef8fd75d7ec2ba51c
 https://conda.anaconda.org/conda-forge/noarch/babel-2.9.0-pyhd3deb0d_0.tar.bz2#1cb532c9a6fd4e56a9f0906b87c17b76
 https://conda.anaconda.org/conda-forge/linux-64/certifi-2020.12.5-py37h89c1867_1.tar.bz2#fb121f213009359498ada17a9e6d775f
@@ -98,6 +99,7 @@ https://conda.anaconda.org/conda-forge/noarch/jinja2-2.11.3-pyh44b312d_0.tar.bz2
 https://conda.anaconda.org/conda-forge/linux-64/jsonschema-3.2.0-py37hc8dfbb8_1.tar.bz2#3bbfbc1c12652fc35a225180d7aeff19
 https://conda.anaconda.org/conda-forge/noarch/jupyter_client-6.1.11-pyhd8ed1ab_1.tar.bz2#0fcd80df6d4e0558754c39453ffa3110
 https://conda.anaconda.org/conda-forge/noarch/oauthlib-3.0.1-py_0.tar.bz2#faaf2a8fd1cddecbf1818fcf0ed3a3b6
+https://conda.anaconda.org/conda-forge/noarch/pip-21.0.1-pyhd8ed1ab_0.tar.bz2#849477e10d78cbc283c78fd53bfbb567
 https://conda.anaconda.org/conda-forge/noarch/pygments-2.8.0-pyhd8ed1ab_0.tar.bz2#226cd14ba0554ca2648fecd11090f473
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 https://conda.anaconda.org/conda-forge/linux-64/ruamel.yaml-0.16.12-py37h5e8e339_2.tar.bz2#93d2ddcc1fd02bd503c2206027576b5e
diff --git a/repo2docker/buildpacks/conda/environment.py-2.7.frozen.yml b/repo2docker/buildpacks/conda/environment.py-2.7.frozen.yml
index cedf354c..20bc0cc6 100644
--- a/repo2docker/buildpacks/conda/environment.py-2.7.frozen.yml
+++ b/repo2docker/buildpacks/conda/environment.py-2.7.frozen.yml
@@ -1,7 +1,7 @@
 # AUTO GENERATED FROM environment.py-2.7.yml, DO NOT MANUALLY MODIFY
-# Frozen on 2021-03-03 10:12:18 UTC
+# Frozen on 2021-03-03 11:08:20 UTC
 # platform: linux-64
-# env_hash: 1e9c09ca594c43a1f5b3a5b3ad169bfcecd1b38149ac1c7d277d117d8b44a6b6
+# env_hash: aa32b5266e821b621a99f599839e0352426077f660b0437604299a2ed808b836
 @EXPLICIT
 https://conda.anaconda.org/conda-forge/linux-64/_libgcc_mutex-0.1-conda_forge.tar.bz2#d7c89558ba9fa0495403155b64376d81
 https://conda.anaconda.org/conda-forge/linux-64/ca-certificates-2020.12.5-ha878542_0.tar.bz2#7eb5d4ffeee663caa1635cd67071bc1b
@@ -30,6 +30,7 @@ https://conda.anaconda.org/conda-forge/linux-64/python_abi-2.7-1_cp27mu.tar.bz2#
 https://conda.anaconda.org/conda-forge/linux-64/simplegeneric-0.8.1-py27_0.tar.bz2#f1db3b1ec8ca72f3b1a26331b386aa51
 https://conda.anaconda.org/conda-forge/noarch/six-1.15.0-pyh9f0ad1d_0.tar.bz2#1eec421f0f1f39e579e44e4a5ce646a2
 https://conda.anaconda.org/conda-forge/noarch/wcwidth-0.1.9-pyh9f0ad1d_0.tar.bz2#ef10a99c7570762fa2a69218c171dbc8
+https://conda.anaconda.org/conda-forge/noarch/wheel-0.36.2-pyhd3deb0d_0.tar.bz2#768bfbe026426d0e76b377997d1f2b98
 https://conda.anaconda.org/conda-forge/linux-64/certifi-2019.11.28-py27h8c360ce_1.tar.bz2#a345324a2547908c1f9ca4b65d93f5ba
 https://conda.anaconda.org/conda-forge/linux-64/configparser-3.7.3-py27h8c360ce_2.tar.bz2#fce87da76335c7274cb858745fded401
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@@ -46,6 +47,7 @@ https://conda.anaconda.org/conda-forge/linux-64/tornado-5.1.1-py27h14c3975_1000.
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+https://conda.anaconda.org/conda-forge/noarch/pip-20.1.1-pyh9f0ad1d_0.tar.bz2#cd67a20c73ff2514cf5f34cae28fc867
 https://conda.anaconda.org/conda-forge/noarch/pygments-2.5.2-py_0.tar.bz2#c48719b941c60b26add57de2b014ef96
 https://conda.anaconda.org/conda-forge/linux-64/jupyter_client-5.3.4-py27_1.tar.bz2#ec6099141189dfae14367478d3e96fa9
 https://conda.anaconda.org/conda-forge/linux-64/prompt_toolkit-1.0.15-py27_0.tar.bz2#e64d8ff5a16afcea0dff046bc837f6db
diff --git a/repo2docker/buildpacks/conda/environment.py-3.6.frozen.yml b/repo2docker/buildpacks/conda/environment.py-3.6.frozen.yml
index 3dc55515..cd0ee51a 100644
--- a/repo2docker/buildpacks/conda/environment.py-3.6.frozen.yml
+++ b/repo2docker/buildpacks/conda/environment.py-3.6.frozen.yml
@@ -1,18 +1,17 @@
 # AUTO GENERATED FROM environment.py-3.6.yml, DO NOT MANUALLY MODIFY
-# Frozen on 2021-03-03 10:12:35 UTC
+# Frozen on 2021-03-03 11:00:53 UTC
 # platform: linux-64
-# env_hash: a51a09ac3f6f3df1262919a6dc087f284a027e50b70f065faad341a1e4a6d956
+# env_hash: 7e46311fb9705730ffebbaf89b8f9d7da823b47c71a7b5ec994515801417c0a6
 @EXPLICIT
 https://conda.anaconda.org/conda-forge/linux-64/_libgcc_mutex-0.1-conda_forge.tar.bz2#d7c89558ba9fa0495403155b64376d81
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+https://conda.anaconda.org/conda-forge/linux-64/ld_impl_linux-64-2.35.1-hea4e1c9_2.tar.bz2#83610dba766a186bdc7a116053b782a4
 https://conda.anaconda.org/conda-forge/linux-64/libstdcxx-ng-9.3.0-h6de172a_18.tar.bz2#2f03cd1e5c966d4af5822c7ae089ab03
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-https://conda.anaconda.org/conda-forge/linux-64/bzip2-1.0.8-h7f98852_4.tar.bz2#a1fd65c7ccbf10880423d82bca54eb54
 https://conda.anaconda.org/conda-forge/linux-64/c-ares-1.17.1-h36c2ea0_0.tar.bz2#1aa683618a2df66800d568409d6841d1
-https://conda.anaconda.org/conda-forge/linux-64/expat-2.2.10-h9c3ff4c_0.tar.bz2#c924bc4e7ae49118f6c97bd4357fed0e
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@@ -26,108 +25,108 @@ https://conda.anaconda.org/conda-forge/linux-64/libssh2-1.9.0-hab1572f_5.tar.bz2
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-https://conda.anaconda.org/conda-forge/linux-64/gdbm-1.18-h0a1914f_2.tar.bz2#b77bc399b07a19c00fe12fdc95ee0297
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-https://conda.anaconda.org/conda-forge/linux-64/pypy3.6-7.3.3-he1ebe50_3.tar.bz2#1f54d5e73a7ef828738c66a935d4d9ad
-https://conda.anaconda.org/conda-forge/linux-64/python_abi-3.6-1_pypy36_pp73.tar.bz2#312b2547eb18afe45526e5ef3bf13424
-https://conda.anaconda.org/conda-forge/linux-64/python-3.6.12-5_73_pypy.tar.bz2#d648696136de39fcd186968d62f2bd77
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diff --git a/repo2docker/buildpacks/conda/environment.py-3.6.yml b/repo2docker/buildpacks/conda/environment.py-3.6.yml
index 607fa236..ba9abfd7 100644
--- a/repo2docker/buildpacks/conda/environment.py-3.6.yml
+++ b/repo2docker/buildpacks/conda/environment.py-3.6.yml
@@ -1,9 +1,10 @@
 # AUTO GENERATED FROM environment.yml, DO NOT MANUALLY MODIFY
-# Generated on 2021-03-03 10:12:18 UTC
+# Generated on 2021-03-03 11:00:36 UTC
 channels:
 - conda-forge
 dependencies:
 - python=3.6.*
+- pip
 - ipywidgets==7.6.3
 - jupyter-offlinenotebook==0.2.1
 - jupyter-resource-usage==0.5.1
diff --git a/repo2docker/buildpacks/conda/environment.py-3.7.frozen.yml b/repo2docker/buildpacks/conda/environment.py-3.7.frozen.yml
index cdd0de11..0418602c 100644
--- a/repo2docker/buildpacks/conda/environment.py-3.7.frozen.yml
+++ b/repo2docker/buildpacks/conda/environment.py-3.7.frozen.yml
@@ -1,7 +1,7 @@
 # AUTO GENERATED FROM environment.py-3.7.yml, DO NOT MANUALLY MODIFY
-# Frozen on 2021-03-03 10:12:57 UTC
+# Frozen on 2021-03-03 11:01:09 UTC
 # platform: linux-64
-# env_hash: 17b507a3f9305647319e6a222a3e371ef047067b01f5448b440895009416cc75
+# env_hash: 0c8bbd1723a38dd480d9b0965600a23fe2863608bb7d09a95be9649702b038ff
 @EXPLICIT
 https://conda.anaconda.org/conda-forge/linux-64/_libgcc_mutex-0.1-conda_forge.tar.bz2#d7c89558ba9fa0495403155b64376d81
 https://conda.anaconda.org/conda-forge/linux-64/ca-certificates-2020.12.5-ha878542_0.tar.bz2#7eb5d4ffeee663caa1635cd67071bc1b
@@ -58,6 +58,7 @@ https://conda.anaconda.org/conda-forge/noarch/six-1.15.0-pyh9f0ad1d_0.tar.bz2#1e
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 https://conda.anaconda.org/conda-forge/noarch/webencodings-0.5.1-py_1.tar.bz2#3563be4c5611a44210d9ba0c16113136
+https://conda.anaconda.org/conda-forge/noarch/wheel-0.36.2-pyhd3deb0d_0.tar.bz2#768bfbe026426d0e76b377997d1f2b98
 https://conda.anaconda.org/conda-forge/noarch/zipp-3.4.0-py_0.tar.bz2#0df927d2e46244cef8fd75d7ec2ba51c
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 https://conda.anaconda.org/conda-forge/linux-64/certifi-2020.12.5-py37h89c1867_1.tar.bz2#fb121f213009359498ada17a9e6d775f
@@ -98,6 +99,7 @@ https://conda.anaconda.org/conda-forge/noarch/jinja2-2.11.3-pyh44b312d_0.tar.bz2
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 https://conda.anaconda.org/conda-forge/noarch/oauthlib-3.0.1-py_0.tar.bz2#faaf2a8fd1cddecbf1818fcf0ed3a3b6
+https://conda.anaconda.org/conda-forge/noarch/pip-21.0.1-pyhd8ed1ab_0.tar.bz2#849477e10d78cbc283c78fd53bfbb567
 https://conda.anaconda.org/conda-forge/noarch/pygments-2.8.0-pyhd8ed1ab_0.tar.bz2#226cd14ba0554ca2648fecd11090f473
 https://conda.anaconda.org/conda-forge/noarch/pyopenssl-20.0.1-pyhd8ed1ab_0.tar.bz2#92371c25994d0f5d28a01c1fb75ebf86
 https://conda.anaconda.org/conda-forge/linux-64/ruamel.yaml-0.16.12-py37h5e8e339_2.tar.bz2#93d2ddcc1fd02bd503c2206027576b5e
diff --git a/repo2docker/buildpacks/conda/environment.py-3.7.yml b/repo2docker/buildpacks/conda/environment.py-3.7.yml
index 8ad75f97..562ef9b3 100644
--- a/repo2docker/buildpacks/conda/environment.py-3.7.yml
+++ b/repo2docker/buildpacks/conda/environment.py-3.7.yml
@@ -1,9 +1,10 @@
 # AUTO GENERATED FROM environment.yml, DO NOT MANUALLY MODIFY
-# Generated on 2021-03-03 10:12:35 UTC
+# Generated on 2021-03-03 11:00:53 UTC
 channels:
 - conda-forge
 dependencies:
 - python=3.7.*
+- pip
 - ipywidgets==7.6.3
 - jupyter-offlinenotebook==0.2.1
 - jupyter-resource-usage==0.5.1
diff --git a/repo2docker/buildpacks/conda/environment.py-3.8.frozen.yml b/repo2docker/buildpacks/conda/environment.py-3.8.frozen.yml
index fcc2cd0b..38f2dd3b 100644
--- a/repo2docker/buildpacks/conda/environment.py-3.8.frozen.yml
+++ b/repo2docker/buildpacks/conda/environment.py-3.8.frozen.yml
@@ -1,7 +1,7 @@
 # AUTO GENERATED FROM environment.py-3.8.yml, DO NOT MANUALLY MODIFY
-# Frozen on 2021-03-03 10:13:17 UTC
+# Frozen on 2021-03-03 11:01:27 UTC
 # platform: linux-64
-# env_hash: fb94d5147cd77a4e31d2be6f973e33f513d02c1f3b3e0590e60585b99eaf3422
+# env_hash: d20cbe90d1613b4bf7cacf18315841c97dc95569fc262252fc03eba2ac577f74
 @EXPLICIT
 https://conda.anaconda.org/conda-forge/linux-64/_libgcc_mutex-0.1-conda_forge.tar.bz2#d7c89558ba9fa0495403155b64376d81
 https://conda.anaconda.org/conda-forge/linux-64/ca-certificates-2020.12.5-ha878542_0.tar.bz2#7eb5d4ffeee663caa1635cd67071bc1b
@@ -57,6 +57,7 @@ https://conda.anaconda.org/conda-forge/noarch/send2trash-1.5.0-py_0.tar.bz2#c377
 https://conda.anaconda.org/conda-forge/noarch/six-1.15.0-pyh9f0ad1d_0.tar.bz2#1eec421f0f1f39e579e44e4a5ce646a2
 https://conda.anaconda.org/conda-forge/noarch/testpath-0.4.4-py_0.tar.bz2#3b98fff4d5342bebde2ecaa314f796f9
 https://conda.anaconda.org/conda-forge/noarch/webencodings-0.5.1-py_1.tar.bz2#3563be4c5611a44210d9ba0c16113136
+https://conda.anaconda.org/conda-forge/noarch/wheel-0.36.2-pyhd3deb0d_0.tar.bz2#768bfbe026426d0e76b377997d1f2b98
 https://conda.anaconda.org/conda-forge/noarch/zipp-3.4.0-py_0.tar.bz2#0df927d2e46244cef8fd75d7ec2ba51c
 https://conda.anaconda.org/conda-forge/noarch/babel-2.9.0-pyhd3deb0d_0.tar.bz2#1cb532c9a6fd4e56a9f0906b87c17b76
 https://conda.anaconda.org/conda-forge/linux-64/certifi-2020.12.5-py38h578d9bd_1.tar.bz2#be470d89b0678991fd4ba67d4a35bc80
@@ -97,6 +98,7 @@ https://conda.anaconda.org/conda-forge/noarch/jinja2-2.11.3-pyh44b312d_0.tar.bz2
 https://conda.anaconda.org/conda-forge/linux-64/jsonschema-3.2.0-py38h32f6830_1.tar.bz2#49dd43811f60b5ba18fb9d7663a451d5
 https://conda.anaconda.org/conda-forge/noarch/jupyter_client-6.1.11-pyhd8ed1ab_1.tar.bz2#0fcd80df6d4e0558754c39453ffa3110
 https://conda.anaconda.org/conda-forge/noarch/oauthlib-3.0.1-py_0.tar.bz2#faaf2a8fd1cddecbf1818fcf0ed3a3b6
+https://conda.anaconda.org/conda-forge/noarch/pip-21.0.1-pyhd8ed1ab_0.tar.bz2#849477e10d78cbc283c78fd53bfbb567
 https://conda.anaconda.org/conda-forge/noarch/pygments-2.8.0-pyhd8ed1ab_0.tar.bz2#226cd14ba0554ca2648fecd11090f473
 https://conda.anaconda.org/conda-forge/noarch/pyopenssl-20.0.1-pyhd8ed1ab_0.tar.bz2#92371c25994d0f5d28a01c1fb75ebf86
 https://conda.anaconda.org/conda-forge/linux-64/ruamel.yaml-0.16.12-py38h497a2fe_2.tar.bz2#5c7262ee3ffb52b2d957766e1548b032
diff --git a/repo2docker/buildpacks/conda/environment.py-3.8.yml b/repo2docker/buildpacks/conda/environment.py-3.8.yml
index 2a4564d8..6b27d94b 100644
--- a/repo2docker/buildpacks/conda/environment.py-3.8.yml
+++ b/repo2docker/buildpacks/conda/environment.py-3.8.yml
@@ -1,9 +1,10 @@
 # AUTO GENERATED FROM environment.yml, DO NOT MANUALLY MODIFY
-# Generated on 2021-03-03 10:12:57 UTC
+# Generated on 2021-03-03 11:01:09 UTC
 channels:
 - conda-forge
 dependencies:
 - python=3.8.*
+- pip
 - ipywidgets==7.6.3
 - jupyter-offlinenotebook==0.2.1
 - jupyter-resource-usage==0.5.1
diff --git a/repo2docker/buildpacks/conda/environment.py-3.9.frozen.yml b/repo2docker/buildpacks/conda/environment.py-3.9.frozen.yml
index 484b350d..35d0b409 100644
--- a/repo2docker/buildpacks/conda/environment.py-3.9.frozen.yml
+++ b/repo2docker/buildpacks/conda/environment.py-3.9.frozen.yml
@@ -1,7 +1,7 @@
 # AUTO GENERATED FROM environment.py-3.9.yml, DO NOT MANUALLY MODIFY
-# Frozen on 2021-03-03 10:13:36 UTC
+# Frozen on 2021-03-03 11:01:53 UTC
 # platform: linux-64
-# env_hash: 2aabd3ffa3a848c0e2cb20cdb37641676f64667b0b7d0924749d1b21469f1fe7
+# env_hash: 04eb8a1dadeb86e8acee6ac0f4ccd184a6c46992a4c42e93cb9bccea91ab1a25
 @EXPLICIT
 https://conda.anaconda.org/conda-forge/linux-64/_libgcc_mutex-0.1-conda_forge.tar.bz2#d7c89558ba9fa0495403155b64376d81
 https://conda.anaconda.org/conda-forge/linux-64/ca-certificates-2020.12.5-ha878542_0.tar.bz2#7eb5d4ffeee663caa1635cd67071bc1b
@@ -58,6 +58,7 @@ https://conda.anaconda.org/conda-forge/noarch/send2trash-1.5.0-py_0.tar.bz2#c377
 https://conda.anaconda.org/conda-forge/noarch/six-1.15.0-pyh9f0ad1d_0.tar.bz2#1eec421f0f1f39e579e44e4a5ce646a2
 https://conda.anaconda.org/conda-forge/noarch/testpath-0.4.4-py_0.tar.bz2#3b98fff4d5342bebde2ecaa314f796f9
 https://conda.anaconda.org/conda-forge/noarch/webencodings-0.5.1-py_1.tar.bz2#3563be4c5611a44210d9ba0c16113136
+https://conda.anaconda.org/conda-forge/noarch/wheel-0.36.2-pyhd3deb0d_0.tar.bz2#768bfbe026426d0e76b377997d1f2b98
 https://conda.anaconda.org/conda-forge/noarch/zipp-3.4.0-py_0.tar.bz2#0df927d2e46244cef8fd75d7ec2ba51c
 https://conda.anaconda.org/conda-forge/noarch/babel-2.9.0-pyhd3deb0d_0.tar.bz2#1cb532c9a6fd4e56a9f0906b87c17b76
 https://conda.anaconda.org/conda-forge/linux-64/certifi-2020.12.5-py39hf3d152e_1.tar.bz2#83afa403caafd7ef3162385cca9bce13
@@ -98,6 +99,7 @@ https://conda.anaconda.org/conda-forge/noarch/jinja2-2.11.3-pyh44b312d_0.tar.bz2
 https://conda.anaconda.org/conda-forge/noarch/jsonschema-3.2.0-py_2.tar.bz2#a17aa962de6145d08e1008cb37c20161
 https://conda.anaconda.org/conda-forge/noarch/jupyter_client-6.1.11-pyhd8ed1ab_1.tar.bz2#0fcd80df6d4e0558754c39453ffa3110
 https://conda.anaconda.org/conda-forge/noarch/oauthlib-3.0.1-py_0.tar.bz2#faaf2a8fd1cddecbf1818fcf0ed3a3b6
+https://conda.anaconda.org/conda-forge/noarch/pip-21.0.1-pyhd8ed1ab_0.tar.bz2#849477e10d78cbc283c78fd53bfbb567
 https://conda.anaconda.org/conda-forge/noarch/pygments-2.8.0-pyhd8ed1ab_0.tar.bz2#226cd14ba0554ca2648fecd11090f473
 https://conda.anaconda.org/conda-forge/noarch/pyopenssl-20.0.1-pyhd8ed1ab_0.tar.bz2#92371c25994d0f5d28a01c1fb75ebf86
 https://conda.anaconda.org/conda-forge/linux-64/ruamel.yaml-0.16.12-py39h3811e60_2.tar.bz2#a8821bb0a052ba053aa74108fac611a8
diff --git a/repo2docker/buildpacks/conda/environment.py-3.9.yml b/repo2docker/buildpacks/conda/environment.py-3.9.yml
index 3023c3f2..48fa8241 100644
--- a/repo2docker/buildpacks/conda/environment.py-3.9.yml
+++ b/repo2docker/buildpacks/conda/environment.py-3.9.yml
@@ -1,9 +1,10 @@
 # AUTO GENERATED FROM environment.yml, DO NOT MANUALLY MODIFY
-# Generated on 2021-03-03 10:13:17 UTC
+# Generated on 2021-03-03 11:01:27 UTC
 channels:
 - conda-forge
 dependencies:
 - python=3.9.*
+- pip
 - ipywidgets==7.6.3
 - jupyter-offlinenotebook==0.2.1
 - jupyter-resource-usage==0.5.1

From d7c26b7a79fb37be02228570f8e6660d3715cc75 Mon Sep 17 00:00:00 2001
From: Min RK <benjaminrk@gmail.com>
Date: Wed, 3 Mar 2021 13:17:46 +0100
Subject: [PATCH 5/8] use mamba create instead of mamba env create

I'm never sure what the difference is,
but mamba env create doesn't accept explicit dependency format
---
 repo2docker/buildpacks/conda/install-miniforge.bash | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/repo2docker/buildpacks/conda/install-miniforge.bash b/repo2docker/buildpacks/conda/install-miniforge.bash
index 5d3c5d9b..b5e0d051 100755
--- a/repo2docker/buildpacks/conda/install-miniforge.bash
+++ b/repo2docker/buildpacks/conda/install-miniforge.bash
@@ -46,7 +46,7 @@ time mamba install -y mamba==${MAMBA_VERSION}
 
 echo "installing notebook env:"
 cat /tmp/environment.yml
-time mamba env create -p ${NB_PYTHON_PREFIX} -f /tmp/environment.yml
+time mamba create --prefix ${NB_PYTHON_PREFIX} --file /tmp/environment.yml
 
 # empty conda history file,
 # which seems to result in some effective pinning of packages in the initial env,
@@ -59,7 +59,7 @@ if [[ -f /tmp/kernel-environment.yml ]]; then
     echo "installing kernel env:"
     cat /tmp/kernel-environment.yml
 
-    time mamba env create -p ${KERNEL_PYTHON_PREFIX} -f /tmp/kernel-environment.yml
+    time mamba create --prefix ${KERNEL_PYTHON_PREFIX} --file /tmp/kernel-environment.yml
     ${KERNEL_PYTHON_PREFIX}/bin/ipython kernel install --prefix "${NB_PYTHON_PREFIX}"
     echo '' > ${KERNEL_PYTHON_PREFIX}/conda-meta/history
     mamba list -p ${KERNEL_PYTHON_PREFIX}

From 789a3a23c3ff691c289d9dc2b4494e38f1e65eeb Mon Sep 17 00:00:00 2001
From: Min RK <benjaminrk@gmail.com>
Date: Wed, 3 Mar 2021 15:35:29 +0100
Subject: [PATCH 6/8] lockfiles need to be installed with `conda create` not
 `conda env create`

use different .lock filename extension, following conda-lock precedent

Could also follow .txt in conda docs!

conda env create -p prefix -f lock.txt *should* work,
but fails with errors about name being required,
but also fails if name is given due to conflict with `-p`
---
 repo2docker/buildpacks/conda/__init__.py      | 41 ++++++++++++++-----
 ...nvironment.frozen.yml => environment.lock} |  0
 ...2.7.frozen.yml => environment.py-2.7.lock} |  0
 ...3.6.frozen.yml => environment.py-3.6.lock} |  0
 ...3.7.frozen.yml => environment.py-3.7.lock} |  0
 ...3.8.frozen.yml => environment.py-3.8.lock} |  0
 ...3.9.frozen.yml => environment.py-3.9.lock} |  0
 repo2docker/buildpacks/conda/freeze.py        |  9 ++--
 .../buildpacks/conda/install-miniforge.bash   | 22 +++++++---
 9 files changed, 51 insertions(+), 21 deletions(-)
 rename repo2docker/buildpacks/conda/{environment.frozen.yml => environment.lock} (100%)
 rename repo2docker/buildpacks/conda/{environment.py-2.7.frozen.yml => environment.py-2.7.lock} (100%)
 rename repo2docker/buildpacks/conda/{environment.py-3.6.frozen.yml => environment.py-3.6.lock} (100%)
 rename repo2docker/buildpacks/conda/{environment.py-3.7.frozen.yml => environment.py-3.7.lock} (100%)
 rename repo2docker/buildpacks/conda/{environment.py-3.8.frozen.yml => environment.py-3.8.lock} (100%)
 rename repo2docker/buildpacks/conda/{environment.py-3.9.frozen.yml => environment.py-3.9.lock} (100%)

diff --git a/repo2docker/buildpacks/conda/__init__.py b/repo2docker/buildpacks/conda/__init__.py
index 491738c8..8325dd72 100644
--- a/repo2docker/buildpacks/conda/__init__.py
+++ b/repo2docker/buildpacks/conda/__init__.py
@@ -23,6 +23,14 @@ class CondaBuildPack(BaseImage):
 
     """
 
+    # The kernel environment file, if any.
+    # As an absolute path within the container.
+    _kernel_environment_file = ""
+
+    # The notebook server environment file, if any.
+    # As an absolute path within the container.
+    _nb_environment_file = ""
+
     def get_build_env(self):
         """Return environment variables to be set.
 
@@ -33,9 +41,15 @@ class CondaBuildPack(BaseImage):
         env = super().get_build_env() + [
             ("CONDA_DIR", "${APP_BASE}/conda"),
             ("NB_PYTHON_PREFIX", "${CONDA_DIR}/envs/notebook"),
+            ("NB_ENVIRONMENT_FILE", self._nb_environment_file),
         ]
         if self.py2:
-            env.append(("KERNEL_PYTHON_PREFIX", "${CONDA_DIR}/envs/kernel"))
+            env.extend(
+                [
+                    ("KERNEL_PYTHON_PREFIX", "${CONDA_DIR}/envs/kernel"),
+                    ("KERNEL_ENVIRONMENT_FILE", self._kernel_environment_file),
+                ]
+            )
         else:
             env.append(("KERNEL_PYTHON_PREFIX", "${NB_PYTHON_PREFIX}"))
         return env
@@ -81,7 +95,7 @@ class CondaBuildPack(BaseImage):
                 r"""
                 TIMEFORMAT='time: %3R' \
                 bash -c 'time /tmp/install-miniforge.bash' && \
-                rm /tmp/install-miniforge.bash /tmp/environment.yml
+                rm /tmp/install-miniforge.bash ${NB_ENVIRONMENT_FILE}
                 """,
             )
         ]
@@ -114,20 +128,25 @@ class CondaBuildPack(BaseImage):
         # major Python versions during upgrade.
         # If no version is specified or no matching X.Y version is found,
         # the default base environment is used.
-        frozen_name = "environment.frozen.yml"
+        frozen_name = "environment.lock"
         if py_version:
             if self.py2:
                 # python 2 goes in a different env
                 files[
-                    "conda/environment.py-2.7.frozen.yml"
-                ] = "/tmp/kernel-environment.yml"
+                    "conda/environment.py-2.7.lock"
+                ] = self._kernel_environment_file = "/tmp/kernel-environment.lock"
             else:
-                py_frozen_name = "environment.py-{py}.frozen.yml".format(py=py_version)
-                if os.path.exists(os.path.join(HERE, py_frozen_name)):
-                    frozen_name = py_frozen_name
-                else:
-                    self.log.warning("No frozen env: %s", py_frozen_name)
-        files["conda/" + frozen_name] = "/tmp/environment.yml"
+                for ext in [".lock", ".frozen.yml"]:
+                    py_frozen_name = f"environment.py-{py_version}{ext}"
+                    if os.path.exists(os.path.join(HERE, py_frozen_name)):
+                        frozen_name = py_frozen_name
+                        break
+                if not frozen_name:
+                    self.log.warning(f"No frozen env for {py_version}")
+        _, frozen_ext = os.path.splitext(frozen_name)
+        files[
+            "conda/" + frozen_name
+        ] = self._nb_environment_file = f"/tmp/environment{frozen_ext}"
         files.update(super().get_build_script_files())
         return files
 
diff --git a/repo2docker/buildpacks/conda/environment.frozen.yml b/repo2docker/buildpacks/conda/environment.lock
similarity index 100%
rename from repo2docker/buildpacks/conda/environment.frozen.yml
rename to repo2docker/buildpacks/conda/environment.lock
diff --git a/repo2docker/buildpacks/conda/environment.py-2.7.frozen.yml b/repo2docker/buildpacks/conda/environment.py-2.7.lock
similarity index 100%
rename from repo2docker/buildpacks/conda/environment.py-2.7.frozen.yml
rename to repo2docker/buildpacks/conda/environment.py-2.7.lock
diff --git a/repo2docker/buildpacks/conda/environment.py-3.6.frozen.yml b/repo2docker/buildpacks/conda/environment.py-3.6.lock
similarity index 100%
rename from repo2docker/buildpacks/conda/environment.py-3.6.frozen.yml
rename to repo2docker/buildpacks/conda/environment.py-3.6.lock
diff --git a/repo2docker/buildpacks/conda/environment.py-3.7.frozen.yml b/repo2docker/buildpacks/conda/environment.py-3.7.lock
similarity index 100%
rename from repo2docker/buildpacks/conda/environment.py-3.7.frozen.yml
rename to repo2docker/buildpacks/conda/environment.py-3.7.lock
diff --git a/repo2docker/buildpacks/conda/environment.py-3.8.frozen.yml b/repo2docker/buildpacks/conda/environment.py-3.8.lock
similarity index 100%
rename from repo2docker/buildpacks/conda/environment.py-3.8.frozen.yml
rename to repo2docker/buildpacks/conda/environment.py-3.8.lock
diff --git a/repo2docker/buildpacks/conda/environment.py-3.9.frozen.yml b/repo2docker/buildpacks/conda/environment.py-3.9.lock
similarity index 100%
rename from repo2docker/buildpacks/conda/environment.py-3.9.frozen.yml
rename to repo2docker/buildpacks/conda/environment.py-3.9.lock
diff --git a/repo2docker/buildpacks/conda/freeze.py b/repo2docker/buildpacks/conda/freeze.py
index dbb28674..3f6085b1 100755
--- a/repo2docker/buildpacks/conda/freeze.py
+++ b/repo2docker/buildpacks/conda/freeze.py
@@ -22,18 +22,17 @@ from ruamel.yaml import YAML
 HERE = pathlib.Path(os.path.dirname(os.path.abspath(__file__)))
 
 ENV_FILE = HERE / "environment.yml"
-FROZEN_FILE = os.path.splitext(ENV_FILE)[0] + ".frozen.yml"
+FROZEN_FILE = os.path.splitext(ENV_FILE)[0] + ".lock"
 
 ENV_FILE_T = HERE / "environment.py-{py}.yml"
-FROZEN_FILE_T = os.path.splitext(ENV_FILE_T)[0] + ".frozen.yml"
 
 yaml = YAML(typ="rt")
 
 
 def freeze(env_file, frozen_file, platform="linux-64"):
-    """Freeze a conda environment.yml
+    """Freeze a conda environment
 
-    By running
+    By running:
 
         conda-lock --mamba --platform=linux-64 -f environment.yml
 
@@ -113,7 +112,7 @@ if __name__ == "__main__":
     for py in pys:
         env_file = pathlib.Path(str(ENV_FILE_T).format(py=py))
         set_python(env_file, py)
-        frozen_file = pathlib.Path(os.path.splitext(env_file)[0] + ".frozen.yml")
+        frozen_file = pathlib.Path(os.path.splitext(env_file)[0] + ".lock")
         freeze(env_file, frozen_file)
         if py == default_py:
             shutil.copy(frozen_file, FROZEN_FILE)
diff --git a/repo2docker/buildpacks/conda/install-miniforge.bash b/repo2docker/buildpacks/conda/install-miniforge.bash
index b5e0d051..dabdb9e9 100755
--- a/repo2docker/buildpacks/conda/install-miniforge.bash
+++ b/repo2docker/buildpacks/conda/install-miniforge.bash
@@ -45,8 +45,15 @@ conda config --system --set channel_priority "flexible"
 time mamba install -y mamba==${MAMBA_VERSION}
 
 echo "installing notebook env:"
-cat /tmp/environment.yml
-time mamba create --prefix ${NB_PYTHON_PREFIX} --file /tmp/environment.yml
+cat "${NB_ENVIRONMENT_FILE}"
+
+if [[ "${NB_ENVIRONMENT_FILE: -5}" == ".lock" ]]; then
+    create="mamba create"
+else
+    create="mamba env create"
+fi
+
+time $create -p ${NB_PYTHON_PREFIX} --file "${NB_ENVIRONMENT_FILE}"
 
 # empty conda history file,
 # which seems to result in some effective pinning of packages in the initial env,
@@ -54,12 +61,17 @@ time mamba create --prefix ${NB_PYTHON_PREFIX} --file /tmp/environment.yml
 # this file must not be *removed*, however
 echo '' > ${NB_PYTHON_PREFIX}/conda-meta/history
 
-if [[ -f /tmp/kernel-environment.yml ]]; then
+if [[ ! -z "${KERNEL_ENVIRONMENT_FILE:-}" && -f "${KERNEL_ENVIRONMENT_FILE}" ]]; then
     # install kernel env and register kernelspec
     echo "installing kernel env:"
-    cat /tmp/kernel-environment.yml
+    cat "${KERNEL_ENVIRONMENT_FILE}"
+    if [[ "${KERNEL_ENVIRONMENT_FILE: -5}" == ".lock" ]]; then
+        create="mamba create"
+    else
+        create="mamba env create"
+    fi
 
-    time mamba create --prefix ${KERNEL_PYTHON_PREFIX} --file /tmp/kernel-environment.yml
+    time $create -p ${KERNEL_PYTHON_PREFIX} --file "${KERNEL_ENVIRONMENT_FILE}"
     ${KERNEL_PYTHON_PREFIX}/bin/ipython kernel install --prefix "${NB_PYTHON_PREFIX}"
     echo '' > ${KERNEL_PYTHON_PREFIX}/conda-meta/history
     mamba list -p ${KERNEL_PYTHON_PREFIX}

From 03d673b096867914ca7775e4a02df61d311af741 Mon Sep 17 00:00:00 2001
From: Min RK <benjaminrk@gmail.com>
Date: Mon, 8 Mar 2021 12:58:07 +0100
Subject: [PATCH 7/8] support separate pip requirements.txt in base env

- require base env to be a lockfile, environment.yml no longer allowed
- separate `requirements.py-x.y.txt` can be processed post-install, if present
- use this for Python 3.5 env, which has some dependencies only from pip (newer versions than the last py35 build on conda-forge)
---
 repo2docker/buildpacks/conda/__init__.py      | 51 ++++++++---
 .../conda/environment.py-3.5.frozen.yml       | 86 -------------------
 .../buildpacks/conda/environment.py-3.5.lock  | 67 +++++++++++++++
 .../buildpacks/conda/install-miniforge.bash   | 26 +++---
 .../buildpacks/conda/requirements.py-3.5.txt  | 17 ++++
 5 files changed, 136 insertions(+), 111 deletions(-)
 delete mode 100644 repo2docker/buildpacks/conda/environment.py-3.5.frozen.yml
 create mode 100644 repo2docker/buildpacks/conda/environment.py-3.5.lock
 create mode 100644 repo2docker/buildpacks/conda/requirements.py-3.5.txt

diff --git a/repo2docker/buildpacks/conda/__init__.py b/repo2docker/buildpacks/conda/__init__.py
index 8325dd72..966d2324 100644
--- a/repo2docker/buildpacks/conda/__init__.py
+++ b/repo2docker/buildpacks/conda/__init__.py
@@ -23,13 +23,17 @@ class CondaBuildPack(BaseImage):
 
     """
 
-    # The kernel environment file, if any.
+    # The kernel conda environment file, if any.
     # As an absolute path within the container.
     _kernel_environment_file = ""
+    # extra pip requirements.txt for the kernel
+    _kernel_requirements_file = ""
 
-    # The notebook server environment file, if any.
+    # The notebook server environment file.
     # As an absolute path within the container.
     _nb_environment_file = ""
+    # extra pip requirements.txt for the notebook env
+    _nb_requirements_file = ""
 
     def get_build_env(self):
         """Return environment variables to be set.
@@ -38,18 +42,28 @@ class CondaBuildPack(BaseImage):
         the `NB_PYTHON_PREFIX` to the location of the jupyter binary.
 
         """
+        if not self._nb_environment_file:
+            # get_build_scripts locates requirements/environment files
+            self.get_build_scripts()
+
         env = super().get_build_env() + [
             ("CONDA_DIR", "${APP_BASE}/conda"),
             ("NB_PYTHON_PREFIX", "${CONDA_DIR}/envs/notebook"),
             ("NB_ENVIRONMENT_FILE", self._nb_environment_file),
         ]
-        if self.py2:
+        if self._nb_requirements_file:
+            env.append(("NB_REQUIREMENTS_FILE", self._nb_requirements_file))
+
+        if self._kernel_environment_file:
+            # if kernel environment file is separate
             env.extend(
                 [
                     ("KERNEL_PYTHON_PREFIX", "${CONDA_DIR}/envs/kernel"),
                     ("KERNEL_ENVIRONMENT_FILE", self._kernel_environment_file),
                 ]
             )
+            if self._kernel_requirements_file:
+                env.append(("KERNEL_REQUIREMENTS_FILE", self._kernel_requirements_file))
         else:
             env.append(("KERNEL_PYTHON_PREFIX", "${NB_PYTHON_PREFIX}"))
         return env
@@ -95,7 +109,7 @@ class CondaBuildPack(BaseImage):
                 r"""
                 TIMEFORMAT='time: %3R' \
                 bash -c 'time /tmp/install-miniforge.bash' && \
-                rm /tmp/install-miniforge.bash ${NB_ENVIRONMENT_FILE}
+                rm -rf /tmp/install-miniforge.bash /tmp/env
                 """,
             )
         ]
@@ -129,24 +143,37 @@ class CondaBuildPack(BaseImage):
         # If no version is specified or no matching X.Y version is found,
         # the default base environment is used.
         frozen_name = "environment.lock"
+        pip_frozen_name = "requirements.txt"
         if py_version:
             if self.py2:
                 # python 2 goes in a different env
                 files[
                     "conda/environment.py-2.7.lock"
-                ] = self._kernel_environment_file = "/tmp/kernel-environment.lock"
+                ] = self._kernel_environment_file = "/tmp/env/kernel-environment.lock"
+                # additional pip requirements for kernel env
+                if os.path.exists(os.path.join(HERE, "requirements.py-2.7.txt")):
+                    files[
+                        "conda/requirements.py-2.7.txt"
+                    ] = (
+                        self._kernel_requirements_file
+                    ) = "/tmp/env/kernel-requirements.txt"
             else:
-                for ext in [".lock", ".frozen.yml"]:
-                    py_frozen_name = f"environment.py-{py_version}{ext}"
-                    if os.path.exists(os.path.join(HERE, py_frozen_name)):
-                        frozen_name = py_frozen_name
-                        break
+                py_frozen_name = f"environment.py-{py_version}.lock"
+                if os.path.exists(os.path.join(HERE, py_frozen_name)):
+                    frozen_name = py_frozen_name
+                    pip_frozen_name = f"requirements.py-{py_version}.txt"
                 if not frozen_name:
                     self.log.warning(f"No frozen env for {py_version}")
-        _, frozen_ext = os.path.splitext(frozen_name)
         files[
             "conda/" + frozen_name
-        ] = self._nb_environment_file = f"/tmp/environment{frozen_ext}"
+        ] = self._nb_environment_file = "/tmp/env/environment.lock"
+
+        # add requirements.txt, if present
+        if os.path.exists(os.path.join(HERE, pip_frozen_name)):
+            files[
+                "conda/" + pip_frozen_name
+            ] = self._nb_requirements_file = "/tmp/env/requirements.txt"
+
         files.update(super().get_build_script_files())
         return files
 
diff --git a/repo2docker/buildpacks/conda/environment.py-3.5.frozen.yml b/repo2docker/buildpacks/conda/environment.py-3.5.frozen.yml
deleted file mode 100644
index 7aa3aea3..00000000
--- a/repo2docker/buildpacks/conda/environment.py-3.5.frozen.yml
+++ /dev/null
@@ -1,86 +0,0 @@
-# py3.5 conda packages are no longer being updated as of 12/2018
-# this file is hand-maintained now
-# and should only receive security fixes, no new features
-name: r2d
-channels:
-  - conda-forge
-  - defaults
-  - conda-forge/label/broken
-dependencies:
-  - backcall=0.1.0=py_0
-  - bleach=3.0.2=py_0
-  - bzip2=1.0.6=h470a237_2
-  - ca-certificates=2018.10.15=ha4d7672_0
-  - certifi=2018.8.24=py35_1001
-  - decorator=4.3.0=py_0
-  - defusedxml=0.5.0=py_1
-  - entrypoints=0.2.3=py35_2
-  - gmp=6.1.2=hfc679d8_0
-  - ipykernel=5.1.0=pyh24bf2e0_0
-  - ipython=7.0.1=py35h24bf2e0_0
-  - ipython_genutils=0.2.0=py_1
-  - ipywidgets=7.2.1=py35_1
-  - jedi=0.12.1=py35_0
-  - jinja2=2.10=py_1
-  - jsonschema=2.6.0=py35_2
-  - jupyter_client=5.2.3=py_1
-  - jupyter_core=4.4.0=py_0
-  - jupyterlab=0.34.9=py35_0
-  - jupyterlab_launcher=0.13.1=py_2
-  - libffi=3.2.1=hfc679d8_5
-  - libgcc-ng=7.2.0=hdf63c60_3
-  - libsodium=1.0.16=h470a237_1
-  - libstdcxx-ng=7.2.0=hdf63c60_3
-  - markupsafe=1.0=py35h470a237_1
-  - mistune=0.8.3=py35h470a237_2
-  - nbconvert=5.4.0=1
-  - nbformat=4.4.0=py_1
-  - ncurses=6.1=hfc679d8_1
-  - openssl=1.0.2p=h470a237_1
-  - pandoc=1.19.2=0
-  - pandocfilters=1.4.2=py_1
-  - parso=0.3.1=py_0
-  - pexpect=4.6.0=py35_0
-  - pickleshare=0.7.5=py35_0
-  - pip=18.0=py35_1001
-  - prometheus_client=0.4.2=py_0
-  - prompt_toolkit=2.0.7=py_0
-  - ptyprocess=0.6.0=py35_1000
-  - pygments=2.2.0=py_1
-  - python=3.5.5=h5001a0f_2
-  - python-dateutil=2.7.5=py_0
-  - pyzmq=17.1.2=py35hae99301_0
-  - readline=7.0=haf1bffa_1
-  - send2trash=1.5.0=py_0
-  - setuptools=40.4.3=py35_0
-  - simplegeneric=0.8.1=py_1
-  - six=1.11.0=py35_1
-  - sqlite=3.25.3=hb1c47c0_0
-  - terminado=0.8.1=py35_1
-  - testpath=0.3.1=py35_1
-  - tk=8.6.9=ha92aebf_0
-  - tornado=5.1.1=py35h470a237_0
-  - traitlets=4.3.2=py35_0
-  - wcwidth=0.1.7=py_1
-  - webencodings=0.5.1=py_1
-  - wheel=0.32.0=py35_1000
-  - widgetsnbextension=3.2.1=py35_1
-  - xz=5.2.4=h470a237_1
-  - zeromq=4.2.5=hfc679d8_6
-  - zlib=1.2.11=h470a237_3
-  - pip:
-    - alembic==1.0.3
-    - async-generator==1.10
-    - chardet==3.0.4
-    - idna==2.7
-    - jupyterhub==0.9.4
-    - mako==1.0.7
-    - notebook==5.7.8
-    - nteract-on-jupyter==1.9.6
-    - pamela==0.3.0
-    - python-editor==1.0.3
-    - python-oauth2==1.1.0
-    - requests==2.20.1
-    - sqlalchemy==1.2.14
-    - urllib3==1.24.1
-prefix: /opt/conda/envs/r2d
diff --git a/repo2docker/buildpacks/conda/environment.py-3.5.lock b/repo2docker/buildpacks/conda/environment.py-3.5.lock
new file mode 100644
index 00000000..25297473
--- /dev/null
+++ b/repo2docker/buildpacks/conda/environment.py-3.5.lock
@@ -0,0 +1,67 @@
+# py3.5 conda packages are no longer being updated as of 12/2018
+# this file is hand-maintained now
+# and should only receive security fixes, no new features
+@EXPLICIT
+https://conda.anaconda.org/conda-forge/linux-64/_libgcc_mutex-0.1-main.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/ca-certificates-2018.10.15-ha4d7672_0.tar.bz2
+https://repo.anaconda.com/pkgs/main/linux-64/libstdcxx-ng-7.2.0-hdf63c60_3.conda
+https://repo.anaconda.com/pkgs/main/linux-64/libgcc-ng-7.2.0-hdf63c60_3.conda
+https://conda.anaconda.org/conda-forge/linux-64/bzip2-1.0.6-h470a237_2.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/gmp-6.1.2-hfc679d8_0.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/libffi-3.2.1-hfc679d8_5.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/libsodium-1.0.16-h470a237_1.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/ncurses-6.1-hfc679d8_1.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/openssl-1.0.2p-h470a237_1.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/xz-5.2.4-h470a237_1.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/zlib-1.2.11-h470a237_3.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/pandoc-1.19.2-0.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/readline-7.0-haf1bffa_1.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/tk-8.6.9-ha92aebf_0.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/zeromq-4.2.5-hfc679d8_6.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/sqlite-3.25.3-hb1c47c0_0.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/python-3.5.5-h5001a0f_2.tar.bz2
+https://conda.anaconda.org/conda-forge/noarch/backcall-0.1.0-py_0.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/certifi-2018.8.24-py35_1001.tar.bz2
+https://conda.anaconda.org/conda-forge/noarch/decorator-4.3.0-py_0.tar.bz2
+https://conda.anaconda.org/conda-forge/noarch/defusedxml-0.5.0-py_1.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/entrypoints-0.2.3-py35_2.tar.bz2
+https://conda.anaconda.org/conda-forge/noarch/ipython_genutils-0.2.0-py_1.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/jsonschema-2.6.0-py35_2.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/markupsafe-1.0-py35h470a237_1.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/mistune-0.8.3-py35h470a237_2.tar.bz2
+https://conda.anaconda.org/conda-forge/noarch/pandocfilters-1.4.2-py_1.tar.bz2
+https://conda.anaconda.org/conda-forge/noarch/parso-0.3.1-py_0.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/pickleshare-0.7.5-py35_0.tar.bz2
+https://conda.anaconda.org/conda-forge/noarch/prometheus_client-0.4.2-py_0.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/ptyprocess-0.6.0-py35_1000.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/pyzmq-17.1.2-py35hae99301_0.tar.bz2
+https://conda.anaconda.org/conda-forge/noarch/send2trash-1.5.0-py_0.tar.bz2
+https://conda.anaconda.org/conda-forge/noarch/simplegeneric-0.8.1-py_1.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/six-1.11.0-py35_1.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/testpath-0.3.1-py35_1.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/tornado-5.1.1-py35h470a237_0.tar.bz2
+https://conda.anaconda.org/conda-forge/noarch/wcwidth-0.1.7-py_1.tar.bz2
+https://conda.anaconda.org/conda-forge/noarch/webencodings-0.5.1-py_1.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/jedi-0.12.1-py35_0.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/pexpect-4.6.0-py35_0.tar.bz2
+https://conda.anaconda.org/conda-forge/noarch/python-dateutil-2.7.5-py_0.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/setuptools-40.4.3-py35_0.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/terminado-0.8.1-py35_1.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/traitlets-4.3.2-py35_0.tar.bz2
+https://conda.anaconda.org/conda-forge/noarch/bleach-3.0.2-py_0.tar.bz2
+https://conda.anaconda.org/conda-forge/noarch/jinja2-2.10-py_1.tar.bz2
+https://conda.anaconda.org/conda-forge/noarch/jupyter_core-4.4.0-py_0.tar.bz2
+https://conda.anaconda.org/conda-forge/noarch/pygments-2.2.0-py_1.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/wheel-0.32.0-py35_1000.tar.bz2
+https://conda.anaconda.org/conda-forge/noarch/jupyter_client-5.2.3-py_1.tar.bz2
+https://conda.anaconda.org/conda-forge/noarch/nbformat-4.4.0-py_1.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/pip-18.0-py35_1001.tar.bz2
+https://conda.anaconda.org/conda-forge/noarch/prompt_toolkit-2.0.7-py_0.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/ipython-7.0.1-py35h24bf2e0_0.tar.bz2
+https://conda.anaconda.org/conda-forge/label/broken/noarch/nbconvert-5.4.0-1.tar.bz2
+https://conda.anaconda.org/conda-forge/label/broken/noarch/ipykernel-5.1.0-pyh24bf2e0_0.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/notebook-5.7.0-py35_0.tar.bz2
+https://conda.anaconda.org/conda-forge/noarch/jupyterlab_launcher-0.13.1-py_2.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/widgetsnbextension-3.2.1-py35_1.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/ipywidgets-7.2.1-py35_1.tar.bz2
+https://conda.anaconda.org/conda-forge/linux-64/jupyterlab-0.34.9-py35_0.tar.bz2
diff --git a/repo2docker/buildpacks/conda/install-miniforge.bash b/repo2docker/buildpacks/conda/install-miniforge.bash
index dabdb9e9..3c99b6a0 100755
--- a/repo2docker/buildpacks/conda/install-miniforge.bash
+++ b/repo2docker/buildpacks/conda/install-miniforge.bash
@@ -47,31 +47,31 @@ time mamba install -y mamba==${MAMBA_VERSION}
 echo "installing notebook env:"
 cat "${NB_ENVIRONMENT_FILE}"
 
-if [[ "${NB_ENVIRONMENT_FILE: -5}" == ".lock" ]]; then
-    create="mamba create"
-else
-    create="mamba env create"
+time mamba create -p ${NB_PYTHON_PREFIX} --file "${NB_ENVIRONMENT_FILE}"
+
+if [[ ! -z "${NB_REQUIREMENTS_FILE:-}" ]]; then
+    echo "installing pip requirements"
+    cat "${NB_REQUIREMENTS_FILE}"
+    ${NB_PYTHON_PREFIX}/bin/python -mpip install --no-cache --no-deps -r "${NB_REQUIREMENTS_FILE}"
 fi
-
-time $create -p ${NB_PYTHON_PREFIX} --file "${NB_ENVIRONMENT_FILE}"
-
 # empty conda history file,
 # which seems to result in some effective pinning of packages in the initial env,
 # which we don't intend.
 # this file must not be *removed*, however
 echo '' > ${NB_PYTHON_PREFIX}/conda-meta/history
 
-if [[ ! -z "${KERNEL_ENVIRONMENT_FILE:-}" && -f "${KERNEL_ENVIRONMENT_FILE}" ]]; then
+if [[ ! -z "${KERNEL_ENVIRONMENT_FILE:-}" ]]; then
     # install kernel env and register kernelspec
     echo "installing kernel env:"
     cat "${KERNEL_ENVIRONMENT_FILE}"
-    if [[ "${KERNEL_ENVIRONMENT_FILE: -5}" == ".lock" ]]; then
-        create="mamba create"
-    else
-        create="mamba env create"
+    time mamba create -p ${KERNEL_PYTHON_PREFIX} --file "${KERNEL_ENVIRONMENT_FILE}"
+
+    if [[ ! -z "${KERNEL_REQUIREMENTS_FILE:-}" ]]; then
+        echo "installing pip requirements for kernel"
+        cat "${KERNEL_REQUIREMENTS_FILE}"
+        ${KERNEL_PYTHON_PREFIX}/bin/python -mpip install --no-cache --no-deps -r "${KERNEL_REQUIREMENTS_FILE}"
     fi
 
-    time $create -p ${KERNEL_PYTHON_PREFIX} --file "${KERNEL_ENVIRONMENT_FILE}"
     ${KERNEL_PYTHON_PREFIX}/bin/ipython kernel install --prefix "${NB_PYTHON_PREFIX}"
     echo '' > ${KERNEL_PYTHON_PREFIX}/conda-meta/history
     mamba list -p ${KERNEL_PYTHON_PREFIX}
diff --git a/repo2docker/buildpacks/conda/requirements.py-3.5.txt b/repo2docker/buildpacks/conda/requirements.py-3.5.txt
new file mode 100644
index 00000000..416274ad
--- /dev/null
+++ b/repo2docker/buildpacks/conda/requirements.py-3.5.txt
@@ -0,0 +1,17 @@
+# pip-installed packages for Python 3.5
+# these should only be packages
+# whose versions are too new to have builds available for Python 3.5
+alembic==1.0.3
+async-generator==1.10
+chardet==3.0.4
+idna==2.7
+jupyterhub==0.9.4
+mako==1.0.7
+notebook==5.7.8
+nteract-on-jupyter==1.9.6
+pamela==0.3.0
+python-editor==1.0.3
+python-oauth2==1.1.0
+requests==2.20.1
+sqlalchemy==1.2.14
+urllib3==1.24.1

From e9c22422f6109fe63deda64f397ea9875bc62331 Mon Sep 17 00:00:00 2001
From: Min RK <benjaminrk@gmail.com>
Date: Tue, 6 Jul 2021 09:54:09 +0200
Subject: [PATCH 8/8] fix side-effect method name and add fixme note

---
 repo2docker/buildpacks/conda/__init__.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/repo2docker/buildpacks/conda/__init__.py b/repo2docker/buildpacks/conda/__init__.py
index 966d2324..60ff559f 100644
--- a/repo2docker/buildpacks/conda/__init__.py
+++ b/repo2docker/buildpacks/conda/__init__.py
@@ -43,8 +43,10 @@ class CondaBuildPack(BaseImage):
 
         """
         if not self._nb_environment_file:
-            # get_build_scripts locates requirements/environment files
-            self.get_build_scripts()
+            # get_build_script_files locates requirements/environment files,
+            # populating the _nb_environment_file attribute and others.
+            # FIXME: move file detection and initialization of those attributes to its own step?
+            self.get_build_script_files()
 
         env = super().get_build_env() + [
             ("CONDA_DIR", "${APP_BASE}/conda"),