diff --git a/env/sles15/x86_64/admin/stable/spack.yaml b/env/sles15/x86_64/admin/stable/spack.yaml
index debca59..38ee16f 100644
--- a/env/sles15/x86_64/admin/stable/spack.yaml
+++ b/env/sles15/x86_64/admin/stable/spack.yaml
@@ -7,6 +7,8 @@ spack:
       - $spack/user/$user/spack-stage
     install_tree:
       root: $spack/opt/spack/stable
+    include_concrete:
+    - $spack/spack-psi/env/$os/$target_family/admin/unstable
     include:
     - $spack/spack-psi/env/$os/$target_family/sysconfigs/packages.yaml
     - $spack/spack-psi/env/$os/$target_family/sysconfigs/compilers.yaml
diff --git a/env/sles15/x86_64/admin/unstable/spack.yaml b/env/sles15/x86_64/admin/unstable/spack.yaml
index 237bf50..8f09ecf 100644
--- a/env/sles15/x86_64/admin/unstable/spack.yaml
+++ b/env/sles15/x86_64/admin/unstable/spack.yaml
@@ -6,10 +6,12 @@ spack:
     build_stage:
       - $spack/user/$user/spack-stage
     install_tree:
-      root: $spack/opt/spack/$env
+      root: $spack/opt/spack/unstable
     upstreams:
       spack-instance-1:
         install_tree: $spack/opt/spack/stable
+    include_concrete:
+    - $spack/spack-psi/env/$os/$target_family/admin/testing
     include:
     - $spack/spack-psi/env/$os/$target_family/sysconfigs/packages.yaml
     - $spack/spack-psi/env/$os/$target_family/sysconfigs/compilers.yaml