diff --git a/.gitlab-docker-x86_64.yml b/.gitlab-docker-x86_64.yml
index dd19aa0..aa5304d 100644
--- a/.gitlab-docker-x86_64.yml
+++ b/.gitlab-docker-x86_64.yml
@@ -6,7 +6,7 @@ x86_64:build:
   - if [ -f init ]; then chmod 500 init; fi
   - ([ -z "$REFRESH" -a -f build-cache/${CI_COMMIT_REF_SLUG} ]) && docker load < build-cache/${CI_COMMIT_REF_SLUG} || true
   - rm build-cache/* || true
-  - docker build --build-arg HTTP_PROXY=http://proxy.dege.lan:3128 --cache-from ${CI_REGISTRY_IMAGE}:${VERSIONARCH} -t ${CI_REGISTRY_IMAGE}:${VERSIONARCH} .
+  - docker build ${HTTP_PROXY:+--build-arg HTTP_PROXY=${HTTP_PROXY}} --cache-from ${CI_REGISTRY_IMAGE}:${VERSIONARCH} -t ${CI_REGISTRY_IMAGE}:${VERSIONARCH} .
   - docker push ${CI_REGISTRY_IMAGE}:${VERSIONARCH}
   - docker save ${CI_REGISTRY_IMAGE}:${VERSIONARCH} > build-cache/${CI_COMMIT_REF_SLUG}
   tags: