diff --git a/environments/numlibs/spack.yaml b/environments/numlibs/spack.yaml
new file mode 100644
index 0000000..7120b88
--- /dev/null
+++ b/environments/numlibs/spack.yaml
@@ -0,0 +1,34 @@
+# This is a Spack Environment file fot he main HLRS software stack
+spack:
+  definitions:
+    - core_compiler: [gcc@7.5]
+    - compilers: [gcc@13.2, cce@18.0]
+    - mpis: [cray-mpich@8.1.30]
+    - cflags_noerror_implicit: ['cflags="-Wno-error=implicit-function-declaration -Wno-error=implicit-int -Wno-error=int-conversion -Wno-error=incompatible-pointer-types"']
+    - num_integer_types: [~int64]
+    - num_lib_types: [+shared]
+  include_concrete:
+    - $spack/../environments/hlrs
+  packages:
+    all:
+      prefer: ['%gcc@7.5']
+  # add package specs to the `specs` list
+  specs:
+    - matrix:
+      - [gsl +external-cblas]
+      - [$num_lib_types]
+      - [$%compilers]
+    - matrix:
+      - [metis]
+      - [$num_integer_types]
+      - [$num_lib_types]
+      - [$%compilers]
+    - matrix:
+      - [parmetis]
+      - [$num_integer_types]
+      - [$num_lib_types]
+      - [$^mpis]
+      - [$%compilers]
+  view: false
+  concretizer:
+    unify: when_possible