diff --git a/packages/key4hep-external-stack/package.py b/packages/key4hep-external-stack/package.py
index c4878b6d..e1f9f4f2 100644
--- a/packages/key4hep-external-stack/package.py
+++ b/packages/key4hep-external-stack/package.py
@@ -4,6 +4,8 @@
 
 from spack.pkg.k4.key4hep_stack import Key4hepPackage, install_setup_script
 
+from common import *
+
 
 class Key4hepExternalStack(BundlePackage, Key4hepPackage):
     """Bundle package that contains a basic external software stack upon which