In #183747, we introduced some flags to try and speed up xcodebuild commands. However, looks like that fails if there is no Package.resolved yet.
xcodebuild: error: Could not resolve package dependencies:
a resolved file is required when automatic dependency resolution is disabled and should be placed at
/Users/vashworth/Development/experiment/flutter/swift_pm_add2app/macos/Runner.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Pa
ckage.resolved. Running resolver because requirements have changed.
In #183747, we introduced some flags to try and speed up xcodebuild commands. However, looks like that fails if there is no Package.resolved yet.