Upgrade to Mobian (Trixie) Staging

[biketool]

Back to the question, is anyone running staging? 
If so what did you do to get staging running in Mobian nov/dec 2024 PinePhonepro.

By the way, I met someone using the Pinephone Pro under Mobian 4 months ago and he succeeded in making both the cameras and the MMS work even with multiple Access Point Names. Have you tried that?
https://www.reddit.com/r/pinephone/comme...phone_pro/

Looks good, I got the git cloned and followed the instructions but ninja failed

Code:

Building

$ meson build
$ cd build
$ ninja
$ sudo ninja install

Code:

ninja: error: loading 'build.ninja': No such file or directory

I also tried

Code:

ninja -f meson.build

in the build dir, got this

Code:

ninja: error: meson.build:1: expected '=', got lexing error
project('megapixels', 'c', version: '1.6.1')
       ^ near here

does this megapixels build also build libcamera and attach the pipewire stuff?
(edit)
Libcamera etc. is so you don't need a special build like this megapixels custom compiled for the PPpro cameras.
Mobian Staging has libcamera already which is why that is the best solution.
I still want to see how to get staging installed.