diff --git a/.github/workflows/ci_build.yml b/.github/workflows/ci_build.yml
index 7be577d..65c3077 100644
--- a/.github/workflows/ci_build.yml
+++ b/.github/workflows/ci_build.yml
@@ -89,3 +89,4 @@ jobs:
           zig fmt --check riverctl/
           zig fmt --check rivertile/
           zig fmt --check example/
+          zig fmt --check build.zig