diff --git a/.github/workflows/build-and-test-sandreco.yml b/.github/workflows/build-and-test-sandreco.yml
index fef317e..e5c65d9 100644
--- a/.github/workflows/build-and-test-sandreco.yml
+++ b/.github/workflows/build-and-test-sandreco.yml
@@ -200,5 +200,5 @@ jobs:
         run: |
           export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:~/geant4/lib64:~/root/lib:~/edepsim/lib
           export PATH=${PATH}:~/edepsim/bin
-          ls ~/edepsim/bin
+          source ~/geant4/bin/geant4.sh
           edep-sim -C -g ~/dunendggd/SAND_opt3_STT1.gdml -o SAND_opt3_STT1.edep.root macro.mac