diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c9678373a04fd..d8235fbe20ee7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -46,6 +46,7 @@ jobs:
       SCCACHE_BUCKET: cached-ci-artifacts
       SCCACHE_REGION: us-east-2
       SCCACHE_S3_NO_CREDENTIALS: 1
+      NO_DOWNLOAD_CI_LLVM: 1
       TOOLSTATE_REPO: "https://github.com/rust-lang-nursery/rust-toolstate"
       CACHE_DOMAIN: cached-ci-artifacts.s3.us-east-2.amazonaws.com
     if: "github.event_name == 'pull_request'"