Deb installation not working with Sonos (can't install soco system wide)

[cemno]

I have installed mkchromecast with the deb-package. But if i understand correctly, i have to add the python soco package manually. But when i try to install it with pip install soco system wide i get the following error message:

$ pip install soco
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.

I have tried building virtual environments, but i don't understand how should tell mkchromecast to use them. Is there a way for me to use the gui app and sonos devices?