【Raspberry Pi】pip install が失敗する

Raspberry Pi で「pip install」を実行したところ以下のようなエラーになってしまいました。

test@raspberrypi:~/Desktop/samples $ pip install -r requirements.txt
error: externally-managed-environment

× This environment is externally managed
╰─> To install Python packages system-wide, try apt install
    python3-xyz, where xyz is the package you are trying to
    install.
    
    If you wish to install a non-Debian-packaged Python package,
    create a virtual environment using python3 -m venv path/to/venv.
    Then use path/to/venv/bin/python and path/to/venv/bin/pip. Make
    sure you have python3-full installed.
    
    For more information visit http://rptl.io/venv

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.

$ pip install --break-system-packages {{パッケージ名}}

$ sudo apt-get install pipx

test@raspberrypi:~/Desktop/samples $ pipx ensurepath
Success! Added /home/test/.local/bin to the PATH environment variable.

Consider adding shell completions for pipx. Run 'pipx completions' for instructions.

You will need to open a new terminal or re-login for the PATH changes to take effect.

Otherwise pipx is ready to go! ✨ 🌟 ✨

$ source ~/.bashrc