diff --git a/.github/workflows/_build.yml b/.github/workflows/_build.yml
index 0f421d3..cc29d3b 100644
--- a/.github/workflows/_build.yml
+++ b/.github/workflows/_build.yml
@@ -152,7 +152,7 @@ jobs:
       - name: Build Emacs
         run: >-
           ./builder/build-emacs-for-macos --plan build-plan.yml
-          --no-relink-eln-files --native-full-aot --posix-spawn
+          --no-relink-eln-files --native-full-aot
           ${{ inputs.build_args }}
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/nightly-emacs-28.yml b/.github/workflows/nightly-emacs-28.yml
index dadeb41..d34c38f 100644
--- a/.github/workflows/nightly-emacs-28.yml
+++ b/.github/workflows/nightly-emacs-28.yml
@@ -24,6 +24,8 @@ 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 }}