$CI_COMMIT_REF_SLUG -> $CI_COMMIT_REF_NAME

.gitlab-ci.yml

@@ -12,7 +12,7 @@ variables:
   DOCKER_DRIVER: overlay2
   CONTAINER_IMAGE: lab.compute.dtu.dk:5005/$CI_PROJECT_PATH
   CONTAINER_TEST_IMAGE: $CI_REGISTRY_IMAGE:$CI_COMMIT_SHORT_SHA
-  CONTAINER_RELEASE_IMAGE: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG
+  CONTAINER_RELEASE_IMAGE: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME
   GIT_SUBMODULE_STRATEGY: recursive
 
 before_script: