diff --git a/env/sles15/x86_64/admin/stable/spack.yaml b/env/sles15/x86_64/admin/stable/spack.yaml
index c58eb81..6582f77 100644
--- a/env/sles15/x86_64/admin/stable/spack.yaml
+++ b/env/sles15/x86_64/admin/stable/spack.yaml
@@ -21,6 +21,8 @@ spack:
   include:
     - $spack/../spack-psi/env/$os/$target_family/sysconfigs/packages.yaml
     - $spack/../spack-psi/env/$os/$target_family/sysconfigs/compilers.yaml
+  include_concrete:
+    - /afs/psi.ch/sys/spack/spack-psi/env/sles15/aarch64/admin/stable
   mirrors:
     local_psi: file:///afs/psi.ch/software/spack/testing
   modules:
diff --git a/env/sles15/x86_64/admin/testing/spack.yaml b/env/sles15/x86_64/admin/testing/spack.yaml
index e8de833..0272265 100644
--- a/env/sles15/x86_64/admin/testing/spack.yaml
+++ b/env/sles15/x86_64/admin/testing/spack.yaml
@@ -9,6 +9,8 @@ spack:
   include:
   - $spack/../spack-psi/env/$os/$target_family/sysconfigs/packages.yaml
   - $spack/../spack-psi/env/$os/$target_family/sysconfigs/compilers.yaml
+  include_concrete:
+    - /afs/psi.ch/sys/spack/spack-psi/env/sles15/aarch64/admin/testing
   mirrors:
     local_psi: file:///afs/psi.ch/software/spack/testing
   modules:
diff --git a/env/sles15/x86_64/admin/unstable/spack.yaml b/env/sles15/x86_64/admin/unstable/spack.yaml
index c04433f..95ba006 100644
--- a/env/sles15/x86_64/admin/unstable/spack.yaml
+++ b/env/sles15/x86_64/admin/unstable/spack.yaml
@@ -29,6 +29,8 @@ spack:
   include:
   - $spack/../spack-psi/env/$os/$target_family/sysconfigs/packages.yaml
   - $spack/../spack-psi/env/$os/$target_family/sysconfigs/compilers.yaml
+  include_concrete:
+    - /afs/psi.ch/sys/spack/spack-psi/env/sles15/aarch64/admin/unstable
   mirrors:
     local_psi: file:///afs/psi.ch/software/spack/testing
   modules:
diff --git a/env/sles15/x86_64/users/stable/spack.yaml b/env/sles15/x86_64/users/stable/spack.yaml
index 664842e..51a8e27 100644
--- a/env/sles15/x86_64/users/stable/spack.yaml
+++ b/env/sles15/x86_64/users/stable/spack.yaml
@@ -6,6 +6,7 @@ spack:
     - $spack/../spack-psi/env/sles15/x86_64/sysconfigs/compilers.yaml
   include_concrete:
     - /afs/psi.ch/sys/spack/spack-psi/env/sles15/x86_64/admin/stable
+    - /afs/psi.ch/sys/spack/spack-psi/env/sles15/aarch64/admin/stable
   specs: []
   upstreams:
     stable:
diff --git a/env/sles15/x86_64/users/unstable/spack.yaml b/env/sles15/x86_64/users/unstable/spack.yaml
index 0840a18..294de8e 100644
--- a/env/sles15/x86_64/users/unstable/spack.yaml
+++ b/env/sles15/x86_64/users/unstable/spack.yaml
@@ -7,6 +7,8 @@ spack:
   include_concrete:
     - /afs/psi.ch/sys/spack/spack-psi/env/sles15/x86_64/admin/stable
     - /afs/psi.ch/sys/spack/spack-psi/env/sles15/x86_64/admin/unstable
+    - /afs/psi.ch/sys/spack/spack-psi/env/sles15/aarch64/admin/stable
+    - /afs/psi.ch/sys/spack/spack-psi/env/sles15/aarch64/admin/unstable
   specs: []
   upstreams:
     stable: