diff --git a/env/sles15/x86_64/admin/testing/spack.yaml b/env/sles15/x86_64/admin/testing/spack.yaml
index e5f8057..1f81513 100644
--- a/env/sles15/x86_64/admin/testing/spack.yaml
+++ b/env/sles15/x86_64/admin/testing/spack.yaml
@@ -10,8 +10,5 @@ spack:
   mirrors:
     local_testing: file:///afs/psi.ch/software/spack/testing
     local_unstable: file:///afs/psi.ch/software/spack/unstable
-  specs:
-    - cp2k@2024.1%gcc~cuda
-    - opal@master%gcc
-    - opal@master%gcc ^openmpi
+  specs: []
   view: false