diff --git a/.github/workflows/buck2.yml b/.github/workflows/buck2.yml
index f91ac3d3d..de0915523 100644
--- a/.github/workflows/buck2.yml
+++ b/.github/workflows/buck2.yml
@@ -22,6 +22,7 @@ jobs:
       - uses: dtolnay/rust-toolchain@stable
         with:
           components: rust-src
+          target: ${{matrix.os == 'macos' && 'x86_64-apple-darwin' || ''}}
       - uses: dtolnay/install-buck2@latest
         with:
           prelude-submodule: tools/buck/prelude