diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e784dc57a3..23881001fe 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -69,6 +69,10 @@ workflow: # If running on any branch other than main.
 
 build:
   stage: build
+  cache:
+    key: "${CI_COMMIT_REF_SLUG}"
+    paths:
+      - "${CI_DIR}/scons_cache"
   before_script:
     - find $BUILD_DIR/ -mindepth 1 -delete
     - *default_before_script