I run Debian [stable] (this is currently version 11, codenamed bullseye), for which the standard ruby package is version 2.7.0: Debian -- Details of package ruby in bullseye
I’m a little surprised that git pull should be needed, considering that ./launcher already does that on rebuild:
However, I’m trying with a previous git pull now, which did get some mods, so I’m not sure I understand why the launcher did get those… Ah well, I’ll see how it goes and will come back to you.