diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c0fa2fe90b..3a0ef4d4d4 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -9,6 +9,8 @@ workflow:
 
 test:linux:
   image: $image
+  variables:
+    CUSTOM_PATH: "/custom"
   before_script:
     - ./ci/install-docker-dependencies.sh
   script:
diff --git a/ci/lib.sh b/ci/lib.sh
index 4cce854bad..473a2d0348 100755
--- a/ci/lib.sh
+++ b/ci/lib.sh
@@ -350,7 +350,7 @@ macos-*)
 	;;
 esac
 
-CUSTOM_PATH="$HOME/path"
+CUSTOM_PATH="${CUSTOM_PATH:-$HOME/path}"
 export PATH="$CUSTOM_PATH:$PATH"
 
 case "$jobname" in