diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 9081600c3b82114b802ba4f4aada904489f5d805..781c3c3536d3eac692f21b118f8a90226295a2ec 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -12,9 +12,9 @@ variables:
 copy-files-to-swift:
   stage: upload
   script:
-    - curl -H \'X-Auth-Token: $OS_TOKEN\' -X DELETE $OBJSTORE/ ebrains-spack-builds.tar.gz
+    - curl -H X-Auth-Token: ${OS_TOKEN}' -X DELETE ${OBJSTORE} ebrains-spack-builds.tar.gz
     - tar czf ebrains-spack-builds.tar.gz packages/ repo.yml spack.yaml
-    - curl -H \'X-Auth-Token: $OS_TOKEN\' -i $OBJSTORE/ -X PUT -T ebrains-spack-builds.tar.gz
+    - curl -H 'X-Auth-Token: ${OS_TOKEN}' -i ${OBJSTORE} -X PUT -T ebrains-spack-builds.tar.gz
   tags:
     - shell-runner