Mesa (from retropie extra) error / How much do I need it?

[Azuli]

I JUST did a manual install on bookworm 64bits. Previously I was experimenting with bookworm 32bits, and got basically the same behavior.

Pi Model or other hardware: 4B
Power Supply used: 5v 5.1a Inova charger
RetroPie Version Used (eg 3.6, 3.8.1, 4.1 - do not write latest): 4.8.9
Built From: Standard; (direct raspberry imager online install of bookworm lite 64bit)
USB Devices connected: wireless rii mini keyboard/gamepad
Controller used: rii mini keyboard/gamepad
Error messages received: Error running 'git clone --recursive --depth 1 --shallow-submodules --branch master https://gitlab.freedesktop.org/mesa/mesa/ /home/pi/RetroPie-Setup/tmp/build/mesa-pi4' - returned 128
Verbose log (if relevant): is the full error log ok?

I plan to at least try and run a few ports and light pc games on this. I'm sure I'll need box86/64 and wine at the very least, but I was wondering if not installing the mesa drivers would impact what I want to run in a negative way, or even if it can improve emulation at all.

I need to understand this to make tests and preparations for a pi5 later this year, but for now the 4 is all I have. Looked into it and it seems the script isn't pulling the right version from the master branch for some reason. Not sure how to edit that, couldn't even find the actual script in the retropie setup folder. (I know it's an extra and that I could edit directly on the extra folder and reinstall it if necessary, but even looking at the github isn't helping, nothing caught my eye on the script itself)

[mitu]

Please use the RP-Exta topic or issue tracker for questions specific to the Extra repository. Thank you.