stderr: ERROR: Exception: Traceback (most recent call last): File "C:\Users\alvar\Downloads\sd.webui\system\python\lib\site-packages\pip\_internal\cli\base_command.py", line 107, in _run_wrapper status = _inner_run() File "C:\Users\alvar\Downloads\sd.webui\system\python\lib\site-packages\pip\_internal\cli\base_command.py", line 98, in _inner_run return self.run(options, args) File "C:\Users\alvar\Downloads\sd.webui\system\python\lib\site-packages\pip\_internal\cli\req_command.py", line 85, in wrapper return func(self, options, args) File "C:\Users\alvar\Downloads\sd.webui\system\python\lib\site-packages\pip\_internal\commands\install.py", line 388, in run requirement_set = resolver.resolve( File "C:\Users\alvar\Downloads\sd.webui\system\python\lib\site-packages\pip\_internal\resolution\resolvelib\resolver.py", line 79, in resolve collected = self.factory.collect_root_requirements(root_reqs) File "C:\Users\alvar\Downloads\sd.webui\system\python\lib\site-packages\pip\_internal\resolution\resolvelib\factory.py", line 538, in collect_root_requirements reqs = list( File "C:\Users\alvar\Downloads\sd.webui\system\python\lib\site-packages\pip\_internal\resolution\resolvelib\factory.py", line 494, in _make_requirements_from_install_req cand = self._make_base_candidate_from_link( File "C:\Users\alvar\Downloads\sd.webui\system\python\lib\site-packages\pip\_internal\resolution\resolvelib\factory.py", line 226, in _make_base_candidate_from_link self._link_candidate_cache[link] = LinkCandidate( File "C:\Users\alvar\Downloads\sd.webui\system\python\lib\site-packages\pip\_internal\resolution\resolvelib\candidates.py", line 318, in __init__ super().__init__( File "C:\Users\alvar\Downloads\sd.webui\system\python\lib\site-packages\pip\_internal\resolution\resolvelib\candidates.py", line 161, in __init__ self.dist = self._prepare() File "C:\Users\alvar\Downloads\sd.webui\system\python\lib\site-packages\pip\_internal\resolution\resolvelib\candidates.py", line 238, in _prepare dist = self._prepare_distribution() File "C:\Users\alvar\Downloads\sd.webui\system\python\lib\site-packages\pip\_internal\resolution\resolvelib\candidates.py", line 329, in _prepare_distribution return preparer.prepare_linked_requirement(self._ireq, parallel_builds=True) File "C:\Users\alvar\Downloads\sd.webui\system\python\lib\site-packages\pip\_internal\operations\prepare.py", line 543, in prepare_linked_requirement return self._prepare_linked_requirement(req, parallel_builds) File "C:\Users\alvar\Downloads\sd.webui\system\python\lib\site-packages\pip\_internal\operations\prepare.py", line 658, in _prepare_linked_requirement dist = _get_prepared_distribution( File "C:\Users\alvar\Downloads\sd.webui\system\python\lib\site-packages\pip\_internal\operations\prepare.py", line 77, in _get_prepared_distribution abstract_dist.prepare_distribution_metadata( File "C:\Users\alvar\Downloads\sd.webui\system\python\lib\site-packages\pip\_internal\distributions\sdist.py", line 55, in prepare_distribution_metadata self._install_build_reqs(build_env_installer) File "C:\Users\alvar\Downloads\sd.webui\system\python\lib\site-packages\pip\_internal\distributions\sdist.py", line 132, in _install_build_reqs build_reqs = self._get_build_requires_wheel() File "C:\Users\alvar\Downloads\sd.webui\system\python\lib\site-packages\pip\_internal\distributions\sdist.py", line 107, in _get_build_requires_wheel return backend.get_requires_for_build_wheel() File "C:\Users\alvar\Downloads\sd.webui\system\python\lib\site-packages\pip\_internal\utils\misc.py", line 694, in get_requires_for_build_wheel return super().get_requires_for_build_wheel(config_settings=cs) File "C:\Users\alvar\Downloads\sd.webui\system\python\lib\site-packages\pip\_vendor\pyproject_hooks\_impl.py", line 196, in get_requires_for_build_wheel return self._call_hook( File "C:\Users\alvar\Downloads\sd.webui\system\python\lib\site-packages\pip\_vendor\pyproject_hooks\_impl.py", line 402, in _call_hook raise BackendUnavailable( pip._vendor.pyproject_hooks._impl.BackendUnavailable: Cannot import 'setuptools.build_meta'