I have been writing the occasional python program since before venvs
were a thing, or, at least before I had ever heard of them. I have a
program that I wrote years ago that uses yfinance.  This does not seem
to be available in Devuan, so I installed it from PyPI. Every now and
then the program stops working and that usually means that Yahoo made
changes and I need to get the most recent version of yfinance.  Now, it
is saying that yfinance can not be installed because the environment is
externally managed:

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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/python3.12/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.

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Is there any way to get pip to install to a system that does not use
virtual environments, or any other way to install a module from PyPI to
s non-venv environment?

Marc