OS: Debian GNU/Linux 12 (bookworm)
Architecture: x86_64
Compiler: gcc (Anaconda gcc) 11.2.0
Geant4 env: g4_11.1.2
Geant4 : 11.1.2
cmake version 3.27.6
I have this version of Geant4 installed quite easily on my Debian system.
It will not change anything on the Debian itself as it is installed in a conda environment.
I posted here (see below) in the past an installation guide for Debian (bullseye at that time).
I have sligthly modified it to install Geant4-11.1.2 and this on Debian Bookworm. Ask for info if still needed!