diff --git a/base/data_processing:1 b/base/data_processing:1
index e696958983641eb6029629bef393a1db4c785901..c5c734646d7efc685e07cd20ee5f190da252f01b 100644
--- a/base/data_processing:1
+++ b/base/data_processing:1
@@ -1,4 +1,4 @@
 FROM docker.km3net.de/base/singularity-py3:3.5.3
   MAINTAINER Vladimir Kulikovskiy <vkulikovskiy@km3net.de>
 
-	RUN apt-get install -qq -y environment-modules
+	RUN zsh -c 'apt-get install -qq -y environment-modules'