Wrong variable name for spack config

.gitlab-ci.yml

@@ -38,7 +38,7 @@ variables:
     APPTAINER_EXEC_OPTIONS: ${apptainer_options} --bind ${BUILDCACHE}:/buildcache:rw --bind ${STACK_PATH}:/stack:rw --writable-tmpfs
     SPACK_DISABLE_LOCAL_CONFIG: "true"
     SPACK_USER_CACHE_PATH: "/tmp/spack_cache_${CI_JOB_ID}"
-    SPACK_SITE_CONFIG_PATH: "/stack/spack/etc"
+    SPACK_SYSTEM_CONFIG_PATH: "/stack/spack/etc"
     BUILDCACHE: "/work/scitas-ge/richart/ci/buildcache"
     STACK_PATH: "/work/scitas-ge/richart/ci/${environment}/stack"