diff --git a/env/sles15/x86_64/admin/stable/spack.yaml b/env/sles15/x86_64/admin/stable/spack.yaml
new file mode 100644
index 0000000..5f8197c
--- /dev/null
+++ b/env/sles15/x86_64/admin/stable/spack.yaml
@@ -0,0 +1,14 @@
+spack:
+  concretizer:
+    unify: false
+  config:
+    allow_sgid: false
+    build_stage:
+      - $spack/user/$user/spack-stage
+    install_tree:
+      root: $spack/opt/spack/$env
+    include:
+    - $spack/spack-psi/env/$os/$target_family/sysconfigs/packages.yaml
+    - $spack/spack-psi/env/$os/$target_family/sysconfigs/compilers.yaml
+    specs:
+  view: false
diff --git a/env/sles15/x86_64/admin/testing/spack.yaml b/env/sles15/x86_64/admin/testing/spack.yaml
new file mode 100644
index 0000000..2c6928d
--- /dev/null
+++ b/env/sles15/x86_64/admin/testing/spack.yaml
@@ -0,0 +1,22 @@
+spack:
+  concretizer:
+    unify: false
+  config:
+    allow_sgid: false
+    build_stage:
+      - $spack/user/$user/spack-stage
+    install_tree:
+      root: $spack/opt/spack/$env
+    upstreams:
+      spack-instance-1:
+        install_tree: $spack/opt/spack/stable
+      spack-instance-2:
+        install_tree: $spack/opt/spack/unstable
+    include:
+    - $spack/spack-psi/env/$os/$target_family/sysconfigs/packages.yaml
+    - $spack/spack-psi/env/$os/$target_family/sysconfigs/compilers.yaml
+    specs:
+      - opal@master%gcc@12.3
+      - cp2k@2024.1%gcc@12.3~cuda
+      - py-alphafold@2.3.2~cuda
+  view: false
diff --git a/env/sles15/x86_64/admin/unstable/spack.yaml b/env/sles15/x86_64/admin/unstable/spack.yaml
new file mode 100644
index 0000000..237bf50
--- /dev/null
+++ b/env/sles15/x86_64/admin/unstable/spack.yaml
@@ -0,0 +1,17 @@
+spack:
+  concretizer:
+    unify: false
+  config:
+    allow_sgid: false
+    build_stage:
+      - $spack/user/$user/spack-stage
+    install_tree:
+      root: $spack/opt/spack/$env
+    upstreams:
+      spack-instance-1:
+        install_tree: $spack/opt/spack/stable
+    include:
+    - $spack/spack-psi/env/$os/$target_family/sysconfigs/packages.yaml
+    - $spack/spack-psi/env/$os/$target_family/sysconfigs/compilers.yaml
+    specs:
+  view: false