diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 42b1c69216..8ab47106d0 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -17,6 +17,7 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-latest]
     env:
       RUSTFLAGS: -D warnings
+      CC: deny_c
       CARGO_INCREMENTAL: 0
       RUN_SLOW_TESTS: 1
       RUSTUP_MAX_RETRIES: 10