Trouble building gaffer on macOS

[freder]

I'm trying to use https://github.com/GafferHQ/dependencies/releases/download/6.0.0/gafferDependencies-6.0.0-macos.tar.gz to build gaffer on macos (13.4.1, arm64) — but I'm getting the following error:

dyld[40130]: Library not loaded: /Users/john/dev/gafferBuild/dependencies-6.0.0-source/gafferDependenciesBuild/lib/Python.framework/Versions/3.8/Python
  Referenced from: <929E5BBD-C923-3BD1-9561-6A47D2C41146> /Users/freder/projects/temp/gaffer/__build/lib/Python.framework/Versions/3.8/bin/python3.8
  Reason: tried: '/Users/john/dev/gafferBuild/dependencies-6.0.0-source/gafferDependenciesBuild/lib/Python.framework/Versions/3.8/Python' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/Users/john/dev/gafferBuild/dependencies-6.0.0-source/gafferDependenciesBuild/lib/Python.framework/Versions/3.8/Python' (no such file), '/Users/john/dev/gafferBuild/dependencies-6.0.0-source/gafferDependenciesBuild/lib/Python.framework/Versions/3.8/Python' (no such file), '/Library/Frameworks/Python.framework/Versions/3.8/Python' (no such file), '/System/Library/Frameworks/Python.framework/Versions/3.8/Python' (no such file, not in dyld cache)
CalledProcessError: Command '['/Users/freder/projects/temp/gaffer/__build/bin/python', '-c', "import sys; print( '{}.{}'.format( *sys.version_info[:2] ) )"]' died with <Signals.SIGABRT: 6>.:
  File "/Users/freder/projects/temp/gaffer/SConstruct", line 866:
    basePythonEnv["PYTHON_VERSION"] = subprocess.check_output(
  File "/Users/freder/miniconda3/envs/gaffer/lib/python3.8/subprocess.py", line 415:
    return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
  File "/Users/freder/miniconda3/envs/gaffer/lib/python3.8/subprocess.py", line 516:
    raise CalledProcessError(retcode, process.args,

trying to run the provided python binary directly:

dyld[40503]: Library not loaded: /Users/john/dev/gafferBuild/dependencies-6.0.0-source/gafferDependenciesBuild/lib/Python.framework/Versions/3.8/Python
  Referenced from: <929E5BBD-C923-3BD1-9561-6A47D2C41146> /Users/freder/projects/temp/gaffer/__build/lib/Python.framework/Versions/3.8/bin/python3.8
  Reason: tried: '/Users/john/dev/gafferBuild/dependencies-6.0.0-source/gafferDependenciesBuild/lib/Python.framework/Versions/3.8/Python' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/Users/john/dev/gafferBuild/dependencies-6.0.0-source/gafferDependenciesBuild/lib/Python.framework/Versions/3.8/Python' (no such file), '/Users/john/dev/gafferBuild/dependencies-6.0.0-source/gafferDependenciesBuild/lib/Python.framework/Versions/3.8/Python' (no such file), '/Library/Frameworks/Python.framework/Versions/3.8/Python' (no such file), '/System/Library/Frameworks/Python.framework/Versions/3.8/Python' (no such file, not in dyld cache)
[1]    40503 abort      __build/bin/python

Looks like there are a ton of places where /Users/john/dev/gafferBuild is referenced, when in fact it should be s.th. else. Or am I missing something?

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Bonus question: How do I know which gaffer version is compatible with dependencies 6.0.0?