To don't have None references or empty lists

.gitlab-ci.yml

@@ -10,6 +10,8 @@ check_style:
     - export EASYBUILD_INCLUDE_TOOLCHAINS="$CI_PROJECT_DIR/Custom_Toolchains/*.py,$CI_PROJECT_DIR/Custom_Toolchains/fft/*.py,$CI_PROJECT_DIR/Custom_Toolchains/compiler/*.py,$CI_PROJECT_DIR/Custom_Toolchains/linalg/*.py"
     - export EASYBUILD_ROBOT="$CI_PROJECT_DIR/Golden_Repo"
     - export EASYBUILD_HOOKS="$CI_PROJECT_DIR/Custom_Hooks/eb_hooks.py"
+    # Let's make this a system where all the packages can be installed, so all of them can be checked without aborting
+    - export LMOD_SYSTEM_NAME="juwels"
     - OVERLAYS=$(ls Overlays)
     - for i in $OVERLAYS; do
     - export EASYBUILD_ROBOT="$EASYBUILD_ROBOT:$CI_PROJECT_DIR/Overlays/$i"

Custom_Hooks/eb_hooks.py

@@ -44,11 +44,11 @@ SUPPORTED_TOOLCHAIN_FAMILIES = (
 )
 VETOED_INSTALLATIONS = {
         'juwelsbooster': ['impi'],
-        'juwels': [],
-        'jurecadc': [],
+        'juwels': [''],
+        'jurecadc': [''],
         'jurecabooster': ['OpenMPI', 'CUDA', 'nvidia-driver', 'UCX', 'NVHPC'],
         'jusuf': ['impi'],
-        'hdfml': [],
+        'hdfml': [''],
 }
 
 # Also maintain a list of CUDA enabled compilers