diff --git a/environments/hlrs/spack.yaml b/environments/hlrs/spack.yaml
index 686f6aa..e245deb 100644
--- a/environments/hlrs/spack.yaml
+++ b/environments/hlrs/spack.yaml
@@ -14,8 +14,9 @@ spack:
 #      - [$%core_compiler]
     - matrix:
       - [mpip, extrae]
+      - ['cflags="-Wno-error=implicit-function-declaration -Wno-error=implicit-int"']
       - [^mpi]
-      - ['%gcc@13.2', '%cce@18.0']  # mpip and extrae fail with implicit function declaration when using %cce -> is it actually using cce? 
+      - ['%gcc@13.2', '%cce@18.0'] 
   view: false
   concretizer:
     unify: when_possible