That just failed to work with previous versions with unclear reason.

```
pre-commit installed at .git/hooks/pre-commit
[INFO] Installing environment for https://github.com/PyCQA/isort.
[INFO] Once installed this environment will be reused.
[INFO] This may take a few minutes...
An unexpected error has occurred: CalledProcessError: command: ('/home/tony/.cache/pre-commit/repo3afnie1n/py_env-python3/bin/python', '-mpip', 'install', '.')
return code: 1
...
          RuntimeError: The Poetry configuration is invalid:
            - data.extras.pipfile_deprecated_finder[2] must match pattern
            ^[a-zA-Z-_.0-9]+$
```

Refs. sysadm-environment#5344