GitHub's ubuntu-24.04 runner has PEP 668 enabled, which breaks current pip setup

[vinchatl]

I tried to switch to ubuntu-24.04 to get newer version of gcc and clang compilers, but unfortunately this GitHub runner has PEP 668 enabled.

This means pip can't install python packages system-wide anymore, and needs to setup a virtual environment in which the packages are downloaded and installed.

Here's the output of the fail:

> /usr/bin/sudo apt-get update
**runs fine**

> /usr/bin/sudo apt-get install build-essential libgl1-mesa-dev libgstreamer-gl1.0-0 libpulse-dev libxcb-glx0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 libxcb-render0 libxcb-shape0 libxcb-shm0 libxcb-sync1 libxcb-util1 libxcb-xfixes0 libxcb-xinerama0 libxcb1 libxkbcommon-dev libxkbcommon-x11-0 libxcb-xkb-dev libxcb-cursor0 -y
**runs fine**

> /usr/bin/python3 -m pip install setuptools wheel py7zr==0.20.*
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.
Error: Error: The process '/usr/bin/python3' failed with exit code 1

I'll try to downgrade the python version, but I believe this is linked to the ubuntu version and not python version.

So this action is basically broken on ubuntu-24.04 for now. 😢

[vinchatl]

Btw my configuration is

    version: 6.5.3
    host: linux
    target: desktop
    arch: gcc_64
    install-deps: true
    cache: false
    cache-key-prefix: install-qt-action
    add-tools-to-path: true
    set-env: true
    no-qt-binaries: false
    tools-only: false
    aqtversion: ==3.1.*
    py7zrversion: ==0.20.*
    source: false
    documentation: false
    examples: false

[pzhlkj6612]

Thanks you for submitting this issue. Please see these links:

• Fails to install Qt on macos #230
• Failure on macos-latest: externally-managed-environment #239
• Warning caused by preinstalled p7zip on macOS #244
• p7zip is preinstalled in macos #245

.

[vinchatl]

Thanks for the links @pzhlkj6612 !

As suggested in #239 (comment), removing the setup-python: 'false' configuration solved the issue.