$ pip3 install chirp-20230425.tar.gz
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.
   
    If you wish to install a non-Debian 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.
   
    See /usr/share/doc/python3.11/README.venv for more information.

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.

So I tried pipx:

$ pipx install chirp-20230425.tar.gz
Fatal error from pip prevented installation. Full pip output in file:
    /home/david/.local/pipx/logs/cmd_2023-04-25_11.52.02_pip_errors.log

Some possibly relevant errors from pip install:
    ERROR: Could not find a version that satisfies the requirement chirp-20230425-tar-gz (from versions: none)
    ERROR: No matching distribution found for chirp-20230425-tar-gz

Error installing chirp-20230425-tar-gz.

Any ideas?