diff --git a/env/rhel7/x86_64/admin/unstable/spack.yaml b/env/rhel7/x86_64/admin/unstable/spack.yaml
index d9e8e16..9a0a373 100644
--- a/env/rhel7/x86_64/admin/unstable/spack.yaml
+++ b/env/rhel7/x86_64/admin/unstable/spack.yaml
@@ -16,7 +16,7 @@ spack:
     local_stable: file:///afs/psi.ch/software/spack/stable
   specs:
   - matrix:
-    - [cp2k@2024.1, opal@master]
-    - ['^openmpi']
+    - [cp2k@2024.1, cp2k@2024.1+cuda, opal@master]
+    - [^openmpi]
     - ['%gcc@12.3.0']
   view: false