diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 060bf07e8e547ac300111dcfb5daecd3f54ad372..1dc71d7632cbe9b89a1636bc1aeec54e52eec65e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -84,7 +84,7 @@ geant4-build:
     - mkdir build_GeoModelG4
     - cd build_GeoModelG4
     - echo "${CMAKE_ARGS}"
-    - cmake ${CMAKE_ARGS}  ..
+    - cmake ${CMAKE_ARGS}  ../GeoModelG4
     - cmake --build . -- -j$(nproc)
     - cmake --build . -- install