diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 1598b18..8fa2213 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -4,9 +4,13 @@ workflow:
   rules:
     - if: $CI_COMMIT_BRANCH
 
+variables:
+  STACK_ROOT: "${CI_PROJECT_DIR}/.stack-root"
+
 cache:
   paths:
     - .stack-work
+    - .stack-root
     - _cache
 
 pages: