diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c1bf12d70a118ce7e6a80b6b8fae3aef0487f843..691a21fdfc22190702de6a9ab778f9b85ca4b980 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -258,6 +258,7 @@ jug_dev:default:
   script:
     - source spack.sh ; 
       source eic-spack.sh ;
+      export SPACK_VERSION ;
       cat mirrors.yaml.in | envsubst > mirrors.yaml ;
       docker buildx build --push ${BUILD_OPTIONS}
                    --tag ${CI_REGISTRY}/${CI_PROJECT_PATH}/${BUILD_IMAGE}:${INTERNAL_TAG}