hatch fails to build with Python 3.10.0a4.

=================================== FAILURES ===================================
______________________________ test_existing_venv ______________________________

    def test_existing_venv():
        with temp_chdir():
            runner = CliRunner()
    
            env_name = get_new_venv_name()
            venv_dir = os.path.join(get_venv_dir(), env_name)
    
            try:
                runner.invoke(hatch, ['env', env_name])
>               wait_until(is_venv, venv_dir)

tests/commands/test_env.py:102: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

f = <function is_venv at 0x7f113d108a60>
args = ('/builddir/.virtualenvs/-5Jq',), end_time = 1611339469.5794718

    def wait_until(f, *args):  # no cov
        # https://github.com/kennethreitz/pipenv/pull/403
        end_time = time.time() + 540
        while time.time() < end_time:
            if f(*args):
                time.sleep(0.5)
                return True
            time.sleep(0.2)
>       raise AssertionError('timeout')
E       AssertionError: timeout

tests/utils.py:29: AssertionError

=========================== short test summary info ============================
FAILED tests/commands/test_env.py::test_existing_venv - AssertionError: timeout
= 1 failed, 273 passed, 64 skipped, 1 deselected, 15 warnings in 618.90s (0:10:18) =

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.10/fedora-rawhide-x86_64/01894101-hatch/

For all our attempts to build hatch with Python 3.10, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.10/package/hatch/

Testing and mass rebuild of packages is happening in copr. You can follow these instructions to test locally in mock if your package builds with Python 3.10:
https://copr.fedorainfracloud.org/coprs/g/python/python3.10/

Let us know here if you have any questions.

Python 3.10 will be included in Fedora 35. To make that update smoother, we're building Fedora packages with early pre-releases of Python 3.10.
A build failure prevents us from testing all dependent packages (transitive [Build]Requires), so if this package is required a lot, it's important for us to get it fixed soon.
We'd appreciate help from the people who know this package best, but if you don't want to work on this now, let us know so we can try to work around it on our side.