diff --git a/.github/workflows/nightly-emacs-28.yml b/.github/workflows/nightly-emacs-28.yml
index d34c38f..dadeb41 100644
--- a/.github/workflows/nightly-emacs-28.yml
+++ b/.github/workflows/nightly-emacs-28.yml
@@ -24,8 +24,6 @@ jobs:
       os: macos-10.15
       git_ref: emacs-28
       git_sha: ${{ github.event.inputs.git_sha }}
-      build_args: >-
-        --posix-spawn
     secrets:
       APPLE_DEVELOPER_CERTIFICATE_P12_BASE64: ${{ secrets.APPLE_DEVELOPER_CERTIFICATE_P12_BASE64 }}
       APPLE_DEVELOPER_CERTIFICATE_PASSWORD: ${{ secrets.APPLE_DEVELOPER_CERTIFICATE_PASSWORD }}