diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 3ffc28cf8cfebef2ca585c80bc698c77783611e4..117c4c511f719152fdb78cd773cd1b51f2e0be35 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,9 +2,9 @@ before_script:
 
 job install:
   variables:
-    BASE_PATH: "$PREPROD_BASE_PATH"
-    SQLITE_DB: "${BASE_PATH}/backend_sip.sqlite3"
-    VIRTUALENV: "${BASE_PATH}/.sip-backend_env/"
+    BASE_PATH: ${PREPROD_BASE_PATH}
+    SQLITE_DB: ${BASE_PATH}/backend_sip.sqlite3
+    VIRTUALENV: ${BASE_PATH}/.sip-backend_env/
   script:
     - rsync -ruC . ${BASE_PATH}
     - source ${VIRTUALENV}/bin/activate