[Flutter] How do I target arm64, excluding x86_64, in flutter run -d macos?

flutter run -d chrome runs with no issues, but -d macos triggers the following warning. I'm on arm64, and am happy compiling during development for just arm64. How do I target arm64 alone?

flutter run -d macos
Launching lib/main.dart on macOS in debug mode...
--- xcodebuild: WARNING: Using the first of multiple matching destinations:
{ platform:macOS, arch:arm64, id:00006000-0008299F2229401E }
{ platform:macOS, arch:x86_64, id:00006000-0008299F2229401E }
Building macOS application...

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