diff --git a/env/rhel7/x86_64/admin/stable/spack.yaml b/env/rhel7/x86_64/admin/stable/spack.yaml
index 703f711..bfae444 100644
--- a/env/rhel7/x86_64/admin/stable/spack.yaml
+++ b/env/rhel7/x86_64/admin/stable/spack.yaml
@@ -13,7 +13,6 @@ spack:
   include:
     - $spack/spack-psi/env/$os/$target_family/sysconfigs/packages.yaml
     - $spack/spack-psi/env/$os/$target_family/sysconfigs/compilers.yaml
-  specs: null
   mirrors:
     local_stable: file:///afs/psi.ch/software/spack/stable
     local_unstable: file:///afs/psi.ch/software/spack/unstable
diff --git a/env/rhel7/x86_64/admin/testing/spack.yaml b/env/rhel7/x86_64/admin/testing/spack.yaml
index d24ec61..911c146 100644
--- a/env/rhel7/x86_64/admin/testing/spack.yaml
+++ b/env/rhel7/x86_64/admin/testing/spack.yaml
@@ -20,6 +20,5 @@ spack:
     local_unstable: file:///afs/psi.ch/software/spack/unstable
     local_testing: file:///afs/psi.ch/software/spack/testing
   specs:
-    - cp2k@2024.1%gcc~cuda
-    - opal@master%gcc
+    - gcc@12.3.0
   view: false
diff --git a/env/rhel7/x86_64/admin/unstable/spack.yaml b/env/rhel7/x86_64/admin/unstable/spack.yaml
index 87e486e..c315617 100644
--- a/env/rhel7/x86_64/admin/unstable/spack.yaml
+++ b/env/rhel7/x86_64/admin/unstable/spack.yaml
@@ -20,5 +20,4 @@ spack:
     local_stable: file:///afs/psi.ch/software/spack/stable
     local_unstable: file:///afs/psi.ch/software/spack/unstable
     local_testing: file:///afs/psi.ch/software/spack/testing
-  specs: null
   view: false
diff --git a/env/sles15/x86_64/admin/stable/spack.yaml b/env/sles15/x86_64/admin/stable/spack.yaml
index fac7259..bfae444 100644
--- a/env/sles15/x86_64/admin/stable/spack.yaml
+++ b/env/sles15/x86_64/admin/stable/spack.yaml
@@ -16,5 +16,4 @@ spack:
   mirrors:
     local_stable: file:///afs/psi.ch/software/spack/stable
     local_unstable: file:///afs/psi.ch/software/spack/unstable
-  specs: null
   view: false
diff --git a/env/sles15/x86_64/admin/unstable/spack.yaml b/env/sles15/x86_64/admin/unstable/spack.yaml
index d26625b..250f7cc 100644
--- a/env/sles15/x86_64/admin/unstable/spack.yaml
+++ b/env/sles15/x86_64/admin/unstable/spack.yaml
@@ -19,5 +19,4 @@ spack:
     local_stable: file:///afs/psi.ch/software/spack/stable
     local_unstable: file:///afs/psi.ch/software/spack/unstable
     local_testing: file:///afs/psi.ch/software/spack/testing
-  specs:
   view: false