gistfile1.txt

Processing ./dist/fixtures-4.0.1.tar.gz
  Added fixtures from file:///build/jysksrginz4bgrq6yp8ymizvx0sfk7fa-source/dist/fixtures-4.0.1.tar.gz (from tahoe-lafs==0.0.0) to build tracker '/build/pip-build-tracker-n5bhhvei'
  Created temporary directory: /build/pip-modern-metadata-3vpfnmpi
  Running command Preparing metadata (pyproject.toml)
  Preparing metadata (pyproject.toml) ... done
ERROR: Exception:
Traceback (most recent call last):
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_internal/cli/base_command.py", line 167, in exc_logging_wrapper
    status = run_func(*args)
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_internal/cli/req_command.py", line 247, in wrapper
    return func(self, options, args)
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_internal/commands/install.py", line 369, in run
    requirement_set = resolver.resolve(
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_internal/resolution/resolvelib/resolver.py", line 92, in resolve
    result = self._result = resolver.resolve(
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_vendor/resolvelib/resolvers.py", line 481, in resolve
    state = resolution.resolve(requirements, max_rounds=max_rounds)
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_vendor/resolvelib/resolvers.py", line 373, in resolve
    failure_causes = self._attempt_to_pin_criterion(name)
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_vendor/resolvelib/resolvers.py", line 213, in _attempt_to_pin_criterion
    criteria = self._get_updated_criteria(candidate)
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_vendor/resolvelib/resolvers.py", line 204, in _get_updated_criteria
    self._add_to_criteria(criteria, requirement, parent=candidate)
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_vendor/resolvelib/resolvers.py", line 172, in _add_to_criteria
    if not criterion.candidates:
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_vendor/resolvelib/structs.py", line 151, in __bool__
    return bool(self._sequence)
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_internal/resolution/resolvelib/found_candidates.py", line 155, in __bool__
    return any(self)
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_internal/resolution/resolvelib/found_candidates.py", line 143, in <genexpr>
    return (c for c in iterator if id(c) not in self._incompatible_ids)
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_internal/resolution/resolvelib/found_candidates.py", line 47, in _iter_built
    candidate = func()
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_internal/resolution/resolvelib/factory.py", line 206, in _make_candidate_from_link
    self._link_candidate_cache[link] = LinkCandidate(
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_internal/resolution/resolvelib/candidates.py", line 297, in __init__
    super().__init__(
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_internal/resolution/resolvelib/candidates.py", line 162, in __init__
    self.dist = self._prepare()
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_internal/resolution/resolvelib/candidates.py", line 231, in _prepare
    dist = self._prepare_distribution()
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_internal/resolution/resolvelib/candidates.py", line 308, in _prepare_distribution
    return preparer.prepare_linked_requirement(self._ireq, parallel_builds=True)
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_internal/operations/prepare.py", line 438, in prepare_linked_requirement
    return self._prepare_linked_requirement(req, parallel_builds)
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_internal/operations/prepare.py", line 524, in _prepare_linked_requirement
    dist = _get_prepared_distribution(
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_internal/operations/prepare.py", line 68, in _get_prepared_distribution
    abstract_dist.prepare_distribution_metadata(
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_internal/distributions/sdist.py", line 61, in prepare_distribution_metadata
    self.req.prepare_metadata()
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_internal/req/req_install.py", line 533, in prepare_metadata
    self.metadata_directory = generate_metadata(
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_internal/operations/build/metadata.py", line 35, in generate_metadata
    distinfo_dir = backend.prepare_metadata_for_build_wheel(metadata_dir)
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_internal/utils/misc.py", line 706, in prepare_metadata_for_build_wheel
    return super().prepare_metadata_for_build_wheel(
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_vendor/pep517/wrappers.py", line 188, in prepare_metadata_for_build_wheel
    return self._call_hook('prepare_metadata_for_build_wheel', {
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_vendor/pep517/wrappers.py", line 332, in _call_hook
    raise BackendUnavailable(data.get('traceback', ''))
pip._vendor.pep517.wrappers.BackendUnavailable: Traceback (most recent call last):
  File "/nix/store/0vixrqsg7j2m1hjyd2m7j7k58bcd8bqi-python3.10-pip-22.2.2/lib/python3.10/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 89, in _build_backend
    obj = import_module(mod_path)
  File "/nix/store/9srs642k875z3qdk8glapjycncf2pa51-python3-3.10.7/lib/python3.10/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 992, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1004, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'pbr'