wheel build: FileExistsError

[limann77]

I'm building with an Arch-like distro against Python 3.10:

build() {
	cd "$srcdir/$_pkgname"
	python -m build --wheel --no-isolation
}

package() {
	cd "$srcdir/$_pkgname"
	python -m installer --destdir="$pkgdir" dist/*.whl
}

Traceback (most recent call last):
  File "/usr/lib/python3.10/runpy.py", line 196, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/usr/lib/python3.10/runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "/usr/lib/python3.10/site-packages/installer/__main__.py", line 98, in <module>
    _main(sys.argv[1:], "python -m installer")
  File "/usr/lib/python3.10/site-packages/installer/__main__.py", line 94, in _main
    installer.install(source, destination, {})
  File "/usr/lib/python3.10/site-packages/installer/_core.py", line 109, in install
    record = destination.write_file(
  File "/usr/lib/python3.10/site-packages/installer/destinations.py", line 207, in write_file
    return self.write_to_fs(scheme, path_, stream, is_executable)
  File "/usr/lib/python3.10/site-packages/installer/destinations.py", line 167, in write_to_fs
    raise FileExistsError(message)
FileExistsError: File already exists: $pkg/pandora_stereomatching/usr/lib/python3.10/site-packages/pandora/py.typed

py.typed is an empty file.