Try setting MODULEPATH environment variable directly

.gitlab-ci.yml

@@ -23,8 +23,8 @@ default:
     - source .venv/bin/activate
     - python3 -m pip install --upgrade pip setuptools wheel
     - source /etc/profile.d/modules.sh
+    - export MODULEPATH=/usr/share/Modules/modulefiles:/etc/modulefiles:/usr/share/modulefiles
     - module avail
-    - echo $MODULEPATH
 
 checks:
   stage: check