diff --git a/env/merlin/spack.yaml b/env/merlin/spack.yaml
index e7a4e42..47f4f18 100644
--- a/env/merlin/spack.yaml
+++ b/env/merlin/spack.yaml
@@ -564,12 +564,9 @@ spack:
     - [$mpi]
     - [$blas]
     - [$python]
-  # to be fixed
-  #     - matrix:
-  #       - [cp2k]
-  #       - ['%oneapi']
-  #       - [^intel-oneapi-mpi]
-  #       - [^intel-oneapi-mkl]
+  - matrix:
+    - [cp2k@9.1]
+    - ['%oneapi']
   #     - matrix:
   #       - [relion +cuda]
   #       - ['%nvhpc']