diff --git a/.github/workflows/pr-ubuntu-docker.yml b/.github/workflows/pr-ubuntu-docker.yml
index e36bb0a316..c7c9cdd536 100644
--- a/.github/workflows/pr-ubuntu-docker.yml
+++ b/.github/workflows/pr-ubuntu-docker.yml
@@ -46,6 +46,7 @@ jobs:
                 docker run \
                   --name prepare_deps_container \
                   -v "${{github.workspace}}:/src" \
+                  -e "CI=$CI" \
                   "$base_image" \
                   '/src/misc/deps_linux/${{ matrix.base_system }}.sh' '--ensure-deps-noninteractive'