From 907c6f3ce53cb91d42a0c01b6a14c64b0d6e2c4b Mon Sep 17 00:00:00 2001
From: Min RK <benjaminrk@gmail.com>
Date: Mon, 22 Feb 2021 13:22:56 +0100
Subject: [PATCH] freeze with strict channel priority

avoids pulling in newer releases from defaults

this is conda's default behavior, but not mamba's
---
 repo2docker/buildpacks/conda/freeze.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/repo2docker/buildpacks/conda/freeze.py b/repo2docker/buildpacks/conda/freeze.py
index eaa02e3e..fd98ed5b 100755
--- a/repo2docker/buildpacks/conda/freeze.py
+++ b/repo2docker/buildpacks/conda/freeze.py
@@ -77,6 +77,7 @@ def freeze(env_file, frozen_file):
             "; ".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