From d6bbed3786e63068a1dcfbf830be3f35995aa7c8 Mon Sep 17 00:00:00 2001
From: Min RK <benjaminrk@gmail.com>
Date: Mon, 16 Apr 2018 10:51:27 +0200
Subject: [PATCH] kernel python prefix is always defined, even when it's the
 same as NB_PYTHON_PREFIX

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

diff --git a/repo2docker/buildpacks/conda/__init__.py b/repo2docker/buildpacks/conda/__init__.py
index e7ec6bf5..aba09e47 100644
--- a/repo2docker/buildpacks/conda/__init__.py
+++ b/repo2docker/buildpacks/conda/__init__.py
@@ -31,6 +31,8 @@ class CondaBuildPack(BaseImage):
         ]
         if self.py2:
             env.append(('KERNEL_PYTHON_PREFIX', '${CONDA_DIR}/envs/kernel'))
+        else:
+            env.append(('KERNEL_PYTHON_PREFIX', '${NB_PYTHON_PREFIX}'))
         return env
 
     def get_path(self):