Try compound and within double braces

.github/workflows/integration_tests.yml

@@ -50,18 +50,15 @@ jobs:
     runs-on: macOS-12
     needs: check-pr-body-for-key
     # Don't run if triggered by a PR from a fork since our Secrets won't be provided to the runner.
-    if: needs.check-pr-body-for-key.outputs.RUN_INTEGRATION == 'yes'
+    if: ${{ needs.check-pr-body-for-key.outputs.RUN_INTEGRATION == 'yes' && !github.event.pull_request.head.repo.fork }}
     defaults:
       run:
         working-directory: Samples/Swift/DaysUntilBirthday
     steps:
     - name: Checkout
       uses: actions/checkout@v3
     - name: Build test target for Google Sign-in button for Swift
-      env:
-        SKIP: ${{ needs.check-pr-body-for-key.outputs.RUN_INTEGRATION }}
       run: |
-        echo "$SKIP"
         xcodebuild \
           -project DaysUntilBirthday.xcodeproj \
           build-for-testing \