diff --git a/ci/docker-run.sh b/ci/docker-run.sh
index a10bde9d4..70e4b0137 100755
--- a/ci/docker-run.sh
+++ b/ci/docker-run.sh
@@ -37,6 +37,7 @@ ARGS+=(--user "$(id -u):$(id -g)")
 
 # Environment variables to propagate into the container
 ARGS+=(
+  --env BUILDKITE_BRANCH
   --env BUILDKITE_TAG
   --env CODECOV_TOKEN
   --env CRATES_IO_TOKEN