From 454694ec7ee74dbad590e150ad6059ed43f18f9c Mon Sep 17 00:00:00 2001
From: Gerardo Tauriello <gerardo.tauriello@unibas.ch>
Date: Mon, 13 Jan 2020 16:20:36 +0100
Subject: [PATCH] SCHWED-4556: ensure six is available in venv

Otherwise, 'apt-get autoremove -y' may uninstall it and IPython/Jupyter fails.
---
 singularity/Singularity | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/singularity/Singularity b/singularity/Singularity
index 610c3d299..584c643d5 100644
--- a/singularity/Singularity
+++ b/singularity/Singularity
@@ -83,7 +83,8 @@ virtualenv --system-site-packages $VIRTUALENV_DIR
 # INSTALL REQUIRED PYTHON PACKAGES
 ##################################
 pip install jupyter==1.0.0 \
-            nglview==1.1.6
+            nglview==1.1.6 \
+            six==1.13.0
 
 # DOWNLOAD AND INSTALL MSMS
 ##############
-- 
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