enable macros in build

Author: davidkoski

.github/workflows/pull_request.yml

@@ -89,7 +89,7 @@ jobs:
           xcrun --show-sdk-build-version
           swift --version
           rm -rf ~/Library/Developer/Xcode/DerivedData/*
-          xcodebuild build-for-testing -scheme mlx-swift-lm-Package -destination 'platform=macOS'
+          xcodebuild build-for-testing -scheme mlx-swift-lm-Package -destination 'platform=macOS' -skipMacroValidation
 
       - name: Run Tests (Xcode, macOS)
         shell: sh