From c49694a5ea581ca51f640eff044fd01a7bbea102 Mon Sep 17 00:00:00 2001
From: Tim Head <betatim@gmail.com>
Date: Wed, 7 Nov 2018 18:51:57 +0100
Subject: [PATCH] Update repo2docker/buildpacks/base.py

Co-Authored-By: nuest <daniel.nuest@wwu.de>
---
 repo2docker/buildpacks/base.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/repo2docker/buildpacks/base.py b/repo2docker/buildpacks/base.py
index 128056e4..7940a569 100644
--- a/repo2docker/buildpacks/base.py
+++ b/repo2docker/buildpacks/base.py
@@ -554,7 +554,7 @@ class BaseImage(BuildPack):
             ))
         except FileNotFoundError:
             pass
-        if {'py'}.intersection(self.stencila_contexts):
+        if 'py' in self.stencila_contexts:
             assemble_scripts.extend(
                 [
                     (