[macOS] Building Spidermonkey fails

[Langbart]

Current version [26557], even after I uninstalled Python@3.9 and Python@3.10 from my system, I could not build Spidermonkey.

to reproduce

• Try to build Spidermonkey

bisect

The first commit which allows me to build Spidermonkey is [26207], at [26208] it fails.

• Commit [26208] refers to ​D4424, on the 9/Jan/22 I could build Spidermonkey.
  
• I was also able to build Spidermonkey on the 15/Jan/22 as described on patch ​D4437.

Traceback (most recent call last):

File "../js/src/../../configure.py", line 181, in <module>
    sys.exit(main(sys.argv))
  File "../js/src/../../configure.py", line 52, in main
    sandbox.run(os.path.join(os.path.dirname(__file__), 'moz.configure'))
  File "/Users/paria/0ad/libraries/source/spidermonkey/mozjs-78.6.0/python/mozbuild/mozbuild/configure/__init__.py", line 445, in run
    self.include_file(path)
  File "/Users/paria/0ad/libraries/source/spidermonkey/mozjs-78.6.0/python/mozbuild/mozbuild/configure/__init__.py", line 436, in include_file
    exec_(code, self)
  File "/Users/paria/0ad/libraries/source/spidermonkey/mozjs-78.6.0/python/mozbuild/mozbuild/util.py", line 53, in exec_
    exec(object, globals, locals)
  File "/Users/paria/0ad/libraries/source/spidermonkey/mozjs-78.6.0/moz.configure", line 7, in <module>
    include('build/moz.configure/init.configure')
  File "/Users/paria/0ad/libraries/source/spidermonkey/mozjs-78.6.0/python/mozbuild/mozbuild/configure/__init__.py", line 773, in include_impl
    self.include_file(what)
  File "/Users/paria/0ad/libraries/source/spidermonkey/mozjs-78.6.0/python/mozbuild/mozbuild/configure/__init__.py", line 436, in include_file
    exec_(code, self)
  File "/Users/paria/0ad/libraries/source/spidermonkey/mozjs-78.6.0/python/mozbuild/mozbuild/util.py", line 53, in exec_
    exec(object, globals, locals)
  File "/Users/paria/0ad/libraries/source/spidermonkey/mozjs-78.6.0/build/moz.configure/init.configure", line 254, in <module>
    def virtualenv_python3(env_python, build_env, mozconfig, help):
  File "/Users/paria/0ad/libraries/source/spidermonkey/mozjs-78.6.0/python/mozbuild/mozbuild/configure/__init__.py", line 756, in decorator
    depends = DependsFunction(self, func, dependencies, when=when)
  File "/Users/paria/0ad/libraries/source/spidermonkey/mozjs-78.6.0/python/mozbuild/mozbuild/configure/__init__.py", line 129, in __init__
    sandbox._value_for(self)
  File "/Users/paria/0ad/libraries/source/spidermonkey/mozjs-78.6.0/python/mozbuild/mozbuild/configure/__init__.py", line 542, in _value_for
    return self._value_for_depends(obj)
  File "/Users/paria/0ad/libraries/source/spidermonkey/mozjs-78.6.0/python/mozbuild/mozbuild/util.py", line 1018, in method_call
    cache[args] = self.func(instance, *args)
  File "/Users/paria/0ad/libraries/source/spidermonkey/mozjs-78.6.0/python/mozbuild/mozbuild/configure/__init__.py", line 551, in _value_for_depends
    value = obj.result()
  File "/Users/paria/0ad/libraries/source/spidermonkey/mozjs-78.6.0/python/mozbuild/mozbuild/util.py", line 1018, in method_call
    cache[args] = self.func(instance, *args)
  File "/Users/paria/0ad/libraries/source/spidermonkey/mozjs-78.6.0/python/mozbuild/mozbuild/configure/__init__.py", line 155, in result
    return self._func(*resolved_args)
  File "/Users/paria/0ad/libraries/source/spidermonkey/mozjs-78.6.0/python/mozbuild/mozbuild/configure/__init__.py", line 1161, in wrapped
    return new_func(*args, **kwargs)
  File "/Users/paria/0ad/libraries/source/spidermonkey/mozjs-78.6.0/build/moz.configure/init.configure", line 324, in virtualenv_python3
    found_python = find_program(python)
  File "/Users/paria/0ad/libraries/source/spidermonkey/mozjs-78.6.0/python/mozbuild/mozbuild/configure/__init__.py", line 1160, in wrapped
    self._apply_imports(func, glob)
  File "/Users/paria/0ad/libraries/source/spidermonkey/mozjs-78.6.0/python/mozbuild/mozbuild/configure/__init__.py", line 883, in _apply_imports
    glob[what] = self._get_one_import('%s%s' % (_from, what))
  File "/Users/paria/0ad/libraries/source/spidermonkey/mozjs-78.6.0/python/mozbuild/mozbuild/configure/__init__.py", line 963, in _get_one_import
    exec_(import_line, {}, glob)
  File "/Users/paria/0ad/libraries/source/spidermonkey/mozjs-78.6.0/python/mozbuild/mozbuild/util.py", line 53, in exec_
    exec(object, globals, locals)
  File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'mozfile'
ERROR: Error building spidermonkey