diff --git a/env/rhel7/x86_64/admin/unstable/spack.yaml b/env/rhel7/x86_64/admin/unstable/spack.yaml
index 85abf5a..26299f4 100644
--- a/env/rhel7/x86_64/admin/unstable/spack.yaml
+++ b/env/rhel7/x86_64/admin/unstable/spack.yaml
@@ -14,6 +14,5 @@ spack:
   mirrors:
     local_unstable: file:///afs/psi.ch/software/spack/unstable
     local_stable: file:///afs/psi.ch/software/spack/stable
-  specs:
-    - gcc@12.3.0
+  specs: []
   view: false
diff --git a/env/rhel7/x86_64/sysconfigs/packages.yaml b/env/rhel7/x86_64/sysconfigs/packages.yaml
index 4b5348c..695aaa3 100644
--- a/env/rhel7/x86_64/sysconfigs/packages.yaml
+++ b/env/rhel7/x86_64/sysconfigs/packages.yaml
@@ -169,7 +169,7 @@ packages:
     buildable: false
     externals:
       - prefix: /usr
-        spec: slurm@23-11-0-1 pmi-interface=pmi2 +hwloc +hdf5 +mariadb +pam
+        spec: slurm@23-11-0-1 +pmix +hwloc +hdf5 +mariadb +pam
   sqlite:
     require: '%gcc@4.8.5'
   subversion: