Try specifying 13.0 for xcode-select.

wcarss · wcarss · commit e76a37e0e5ae · 2021-10-21T13:56:24.000-04:00
This commit will be squashed before a merge.
diff --git a/.github/workflows/macos-builds-on-all.yaml b/.github/workflows/macos-builds-on-all.yaml
@@ -79,6 +79,9 @@ jobs:
           # Can't run tests: cross-compiling
           echo "SKIP_TESTS=yes" >> $GITHUB_ENV
 
+          # Use the beta compiler
+          sudo xcode-select -switch /Applications/Xcode_13.0.app/Contents/Developer/
+
           # Set SDK environment variables
           echo "SDKROOT=$(xcrun -sdk macosx11.0 --show-sdk-path)" >> $GITHUB_ENV
           echo "MACOSX_DEPLOYMENT_TARGET=$(xcrun -sdk macosx11.0 --show-sdk-platform-version)" >> $GITHUB_ENV
diff --git a/ci/actions-templates/macos-builds-template.yaml b/ci/actions-templates/macos-builds-template.yaml
@@ -79,6 +79,9 @@ jobs:
           # Can't run tests: cross-compiling
           echo "SKIP_TESTS=yes" >> $GITHUB_ENV
 
+          # Use the beta compiler
+          sudo xcode-select -switch /Applications/Xcode_13.0.app/Contents/Developer/
+
           # Set SDK environment variables
           echo "SDKROOT=$(xcrun -sdk macosx11.0 --show-sdk-path)" >> $GITHUB_ENV
           echo "MACOSX_DEPLOYMENT_TARGET=$(xcrun -sdk macosx11.0 --show-sdk-platform-version)" >> $GITHUB_ENV
