macOS builds on GitHub Actions are failing at `python3 -m pip install requests`

[yukawa]

Description

macOS build on GitHub Actions fails with at the Install pip dependencies step due to externally-managed-environment error.

Steps to reproduce

Steps to reproduce the behavior:

1. Fork google/mozc into your repository.
2. Run GitHub Actions for macOS

Expected behavior

Build succeeds without any error.

Actual behavior

All the builds fail with the following error.

Run python3 -m pip install requests
  python3 -m pip install requests
  shell: /bin/bash -e {0}
error: externally-managed-environment

× This environment is externally managed
╰─> To install Python packages system-wide, try brew install
    xyz, where xyz is the package you are trying to
    install.

    If you wish to install a non-brew-packaged Python package,
    create a virtual environment using python -m venv path/to/venv.
    Then use path/to/venv/bin/python and path/to/venv/bin/pip.

    If you wish to install a non-brew packaged Python application,
    it may be easiest to use pipx install xyz, which will manage a
    virtual environment for you. Make sure you have pipx installed.

note: If you believe this is a mistake, please contact your Python installation or OS distribution provider. You can override this, at the risk of breaking your Python installation or OS, by passing --break-system-packages.
hint: See PEP 668 for the detailed specification.

Version or commit-id

641260dbe918d2f6ddb3168cd43d8664ea08ca43

Environment

• OS: macOS 14.4 / macos-14-arm64 20240325.1

Additional context

• PEP 668 – Marking Python base environments as “externally managed”