pre-commit: [2.2.0] `pre-commit install --install-hooks` fails with: ModuleNotFoundError: No module named 'pip._vendor.six'

Hi!

I’m having trouble to set activate an existing .pre-commit-config.yaml on Debian bullseye. pre-commit crashes saying ModuleNotFoundError: No module named 'pip._vendor.six'. Any idea why?

Here’s what I did on the shell for reproduction:

# cd "$(mktemp -d)"

# git clone https://github.com/hartwork/jawanndenn
Cloning into 'jawanndenn'...
remote: Enumerating objects: 1307, done.
remote: Total 1307 (delta 0), reused 0 (delta 0), pack-reused 1307
Receiving objects: 100% (1307/1307), 223.04 KiB | 951.00 KiB/s, done.
Resolving deltas: 100% (876/876), done.

# cd jawanndenn/

# virtualenv --python=python3.8 py38
created virtual environment CPython3.8.2.final.0-64 in 141ms
  creator CPython3Posix(dest=/tmp/tmp.5152OOPQq6/py38, clear=False, global=False)
  seeder FromAppData(download=False, setuptools=latest, msgpack=latest, pytoml=latest, lockfile=latest, requests=latest, packaging=latest, appdirs=latest, six=latest, retrying=latest, progress=latest, chardet=latest, html5lib=latest, webencodings=latest, colorama=latest, wheel=latest, distlib=latest, certifi=latest, idna=latest, pep517=latest, urllib3=latest, contextlib2=latest, pkg_resources=latest, distro=latest, pip=latest, pyparsing=latest, CacheControl=latest, via=copy, app_data_dir=/home/user/.local/share/virtualenv/seed-app-data/v1.0.1)
  activators BashActivator,CShellActivator,FishActivator,PowerShellActivator,PythonActivator,XonshActivator

# source py38/bin/activate

# pip install pre-commit
Collecting pre-commit
  Using cached pre_commit-2.2.0-py2.py3-none-any.whl (170 kB)
Collecting cfgv>=2.0.0
  Using cached cfgv-3.1.0-py2.py3-none-any.whl (7.3 kB)
Collecting nodeenv>=0.11.1
  Using cached nodeenv-1.3.5-py2.py3-none-any.whl (21 kB)
Collecting toml
  Using cached toml-0.10.0-py2.py3-none-any.whl (25 kB)
Collecting virtualenv>=15.2
  Using cached virtualenv-20.0.15-py2.py3-none-any.whl (4.6 MB)
Processing /home/user/.cache/pip/wheels/13/90/db/290ab3a34f2ef0b5a0f89235dc2d40fea83e77de84ed2dc05c/PyYAML-5.3.1-cp38-cp38-linux_x86_64.whl
Collecting identify>=1.0.0
  Using cached identify-1.4.13-py2.py3-none-any.whl (97 kB)
Requirement already satisfied: appdirs<2,>=1.4.3 in ./py38/lib/python3.8/site-packages (from virtualenv>=15.2->pre-commit) (1.4.3)
Requirement already satisfied: distlib<1,>=0.3.0 in ./py38/lib/python3.8/site-packages (from virtualenv>=15.2->pre-commit) (0.3.0)
Collecting filelock<4,>=3.0.0
  Using cached filelock-3.0.12-py3-none-any.whl (7.6 kB)
Requirement already satisfied: six<2,>=1.9.0 in ./py38/lib/python3.8/site-packages (from virtualenv>=15.2->pre-commit) (1.14.0)
Installing collected packages: cfgv, nodeenv, toml, filelock, virtualenv, pyyaml, identify, pre-commit
Successfully installed cfgv-3.1.0 filelock-3.0.12 identify-1.4.13 nodeenv-1.3.5 pre-commit-2.2.0 pyyaml-5.3.1 toml-0.10.0 virtualenv-20.0.15

# pre-commit install --install-hooks
pre-commit installed at .git/hooks/pre-commit
[INFO] Initializing environment for https://github.com/asottile/pyupgrade.
[INFO] Initializing environment for https://github.com/pre-commit/mirrors-isort.
[INFO] Initializing environment for https://github.com/Lucas-C/pre-commit-hooks-markup.
[INFO] Installing environment for https://github.com/asottile/pyupgrade.
[INFO] Once installed this environment will be reused.
[INFO] This may take a few minutes...
An unexpected error has occurred: CalledProcessError: command: ('/home/user/.cache/pre-commit/repoudqv1j_3/py_env-python3.8/bin/python', '/home/user/.cache/pre-commit/repoudqv1j_3/py_env-python3.8/bin/pip', 'install', '.')
return code: 1
expected return code: 0
stdout: (none)
stderr:
    Traceback (most recent call last):
      File "/home/user/.cache/pre-commit/repoudqv1j_3/py_env-python3.8/bin/pip", line 5, in <module>
        from pip._internal.cli.main import main
      File "/home/user/.cache/pre-commit/repoudqv1j_3/py_env-python3.8/lib/python3.8/site-packages/pip/_internal/cli/main.py", line 10, in <module>
        from pip._internal.cli.autocompletion import autocomplete
      File "/home/user/.cache/pre-commit/repoudqv1j_3/py_env-python3.8/lib/python3.8/site-packages/pip/_internal/cli/autocompletion.py", line 9, in <module>
        from pip._internal.cli.main_parser import create_main_parser
      File "/home/user/.cache/pre-commit/repoudqv1j_3/py_env-python3.8/lib/python3.8/site-packages/pip/_internal/cli/main_parser.py", line 7, in <module>
        from pip._internal.cli import cmdoptions
      File "/home/user/.cache/pre-commit/repoudqv1j_3/py_env-python3.8/lib/python3.8/site-packages/pip/_internal/cli/cmdoptions.py", line 24, in <module>
        from pip._internal.exceptions import CommandError
      File "/home/user/.cache/pre-commit/repoudqv1j_3/py_env-python3.8/lib/python3.8/site-packages/pip/_internal/exceptions.py", line 10, in <module>
        from pip._vendor.six import iteritems
    ModuleNotFoundError: No module named 'pip._vendor.six'

Check the log at /home/user/.cache/pre-commit/pre-commit.log

The log file is here: pre-commit.log

Any ideas what I can do to get things to work?

Thanks and best, Sebastian