diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 12b6190..442a64b 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -12,9 +12,9 @@ variables:
   CONTAINER_BUILDER_IMAGE: $CI_REGISTRY_IMAGE:builder-latest
   CONTAINER_TEST_IMAGE: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG
   CONTAINER_RELEASE_IMAGE: $CI_REGISTRY_IMAGE:latest
-  CONTAINER_TAG_IMAGE: $CI_REGISTRY_IMAGE:${CI_COMMIT_TAG:1}
 
 before_script:
+  - export CONTAINER_TAG_IMAGE="$CI_REGISTRY_IMAGE:${CI_COMMIT_TAG:1}"
   - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
 
 build: