$ pip install -U 'versioningit<3.0.0' >/dev/null

$ pytest -q -s build_backend/
.......
7 passed in 0.10s

$ rm -f dist/streamlink-*; python -m build --sdist --wheel >/dev/null 2>&1

$ bsdtar -xzOf dist/streamlink-*.whl streamlink/_version.py
__version__ = "6.4.2+13.gb8b905bc"

$ bsdtar -xzOf dist/streamlink*.tar.gz streamlink-\*/src/streamlink/_version.py
__version__ = "6.4.2+13.gb8b905bc"

$ bsdtar -xzOf dist/streamlink*.tar.gz streamlink-\*/pyproject.toml | head -n8
[build-system]
requires = [
  "setuptools >=64",
  "wheel",
  # The versioningit build-requirement gets removed from the source distribution,
  # as the version string is already built into it (see the onbuild versioningit hook):
  # "versioningit >=2.0.0,<4",
]

$ bsdtar -xzOf dist/streamlink*.tar.gz streamlink-\*/setup.py | tail -n6
    setup(
        cmdclass=get_cmdclasses(),
        entry_points=entry_points,
        data_files=data_files,
        version="6.4.2+13.gb8b905bc",
    )

$ pip install -U 'versioningit>=3.0.0' >/dev/null

$ pytest -q -s build_backend/
.......
7 passed in 0.09s

$ rm -f dist/streamlink-*; python -m build --sdist --wheel >/dev/null 2>&1

$ bsdtar -xzOf dist/streamlink-*.whl streamlink/_version.py
__version__ = "6.4.2+13.gb8b905bc"

$ bsdtar -xzOf dist/streamlink*.tar.gz streamlink-\*/src/streamlink/_version.py
__version__ = "6.4.2+13.gb8b905bc"

$ bsdtar -xzOf dist/streamlink*.tar.gz streamlink-\*/pyproject.toml | head -n8
[build-system]
requires = [
  "setuptools >=64",
  "wheel",
  # The versioningit build-requirement gets removed from the source distribution,
  # as the version string is already built into it (see the onbuild versioningit hook):
  # "versioningit >=2.0.0,<4",
]

$ bsdtar -xzOf dist/streamlink*.tar.gz streamlink-\*/setup.py | tail -n6
    setup(
        cmdclass=get_cmdclasses(),
        entry_points=entry_points,
        data_files=data_files,
        version="6.4.2+13.gb8b905bc",
    )