diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 8141671a48ebb1ff5b8de7fa6dea86eea410aed0..fa7eba7f6116267346e768f6a0a8bf1eabb25b64 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -5,4 +5,4 @@ slc6-gcc48:
   script:
     - rm /bin/sh && ln -s /bin/bash /bin/sh
     - cd /cvmfs/sft.cern.ch/lcg/releases/LCG_84/ROOT/6.06.02/x86_64-slc6-gcc48-opt/
-    - . bin/thisroot.sh
+    - /bin/bash -x bin/thisroot.sh