diff --git a/.buildkite/Dockerfile b/.buildkite/Dockerfile
index e8fec81e2..71c9ee5d0 100644
--- a/.buildkite/Dockerfile
+++ b/.buildkite/Dockerfile
@@ -16,6 +16,8 @@ ENV RAY_DEFAULT_BUILD=1
 ENV BUILDKITE_PULL_REQUEST=${BUILDKITE_PULL_REQUEST}
 ENV BUILDKITE_COMMIT=${BUILDKITE_COMMIT}
 ENV BUILDKITE_PULL_REQUEST_BASE_BRANCH=${BUILDKITE_PULL_REQUEST_BASE_BRANCH}
+# For wheel build
+ENV DOCKER_TLS_CERTDIR=/certs
 
 RUN apt-get update -qq
 RUN apt-get install -y -qq \