xcode_backend.sh: No such file or directory

[frank06]

I'm attempting to run patrol test --target integration_test/example_test.dart --verbose but it's failing with:

/bin/sh: "/Users/f/fvm/versions/3.7.1/packages/flutter_tools/bin/xcode_backend.sh": No such file or directory
        Command PhaseScriptExecution failed with a nonzero exit code
        note: Building targets in dependency order
        note: Run script build phase 'Run Script' will be run during every build because the option to run the script phase "Based on dependency analysis" is unchecked. (in target 'Runner' from project 'Runner')

However the file is there:

stat /Users/f/fvm/versions/3.7.1/packages/flutter_tools/bin/xcode_backend.sh
16777223 64924682 -rwxr-xr-x 1 f staff 0 804 "Mar  6 12:53:41 2023" "Mar  6 12:52:32 2023" "Mar  6 12:52:32 2023" "Mar  6 12:52:32 2023" 4096 8 0 /Users/f/fvm/versions/3.7.1/packages/flutter_tools/bin/xcode_backend.sh

Any idea what is going on?