No such file or directory error when installing types with mypy

Bug Report

When running the command poetry run mypy --config-file pyproject.toml in GitLab CI, MyPy starts installing types as expected, but then throws an error:

mypy: can't read file '/root/.cache/pypoetry/virtualenvs/our-package-d4xTn211-py3.10/lib/python3.10/site-packages//google': No such file or directory

Expected Behavior

I would expect MyPy to install the required types and run the static analysis check.

Actual Behavior

Installing collected packages: types-PyYAML, types-pytz, types-PyMySQL, urllib3, types-protobuf, pycparser, types-requests, cffi, cryptography, types-pyOpenSSL, types-redis
  Attempting uninstall: urllib3
    Found existing installation: urllib3 1.26.18
    Uninstalling urllib3-1.26.18:
      Successfully uninstalled urllib3-1.26.18
Successfully installed cffi-1.16.0 cryptography-41.0.7 pycparser-2.21 types-PyMySQL-1.1.0.1 types-PyYAML-6.0.12.12 types-protobuf-4.24.0.20240106 types-pyOpenSSL-23.3.0.20240106 types-pytz-2023.3.1.1 types-redis-4.6.0.20240106 types-requests-2.31.0.20240106 urllib3-2.1.0
[notice] A new release of pip is available: 23.3.1 -> 23.3.2
[notice] To update, run: pip install --upgrade pip
mypy: can't read file '/root/.cache/pypoetry/virtualenvs/our-package-d4xTn211-py3.10/lib/python3.10/site-packages//google': No such file or directory
Installing missing stub packages:
/root/.cache/pypoetry/virtualenvs/our-package-d4xTn211-py3.10/bin/python -m pip install types-PyMySQL types-PyYAML types-protobuf types-pytz types-redis types-requests

Your Environment

This error occurs when running the mypy command in GitLab CI.

• Mypy version used: 1.8.0 (also tried with 1.7.0)
• Mypy command-line flags: --config-file pyproject.toml
• Mypy configuration options from mypy.ini (and other config files):

  [tool.mypy]
  disallow_untyped_defs = true
  allow_any_unimported = true
  no_implicit_optional = true
  check_untyped_defs = true
  warn_return_any = true
  warn_unused_ignores = true
  show_error_codes = true
  warn_unused_configs = true
  disallow_incomplete_defs = true
  ignore_missing_imports = true
  files = ["our_package", "examples"]
  exclude = [".venv", ".cache", "build"]
  install_types = false
  non_interactive = true
  pretty = true
  

• Python version used: 3.10

まず、提供された Python 3.10 環境と [tool.mypy] の設定、特に files、exclude、install_types、non_interactive オプションを使って poetry run mypy --config-file pyproject.toml を再現します。/site-packages//google 引数を生成する型インストールの経路を追跡します。必要なスタブパッケージがこの無効なパスなしでインストールされ、GitLab CI で静的解析が完了すれば完了です。