Use /usr/bin/env bash instead of /bin/bash

[xdevs23]

It's more universally supported and makes the script run on NixOS

[xdevs23]

Sure. I force-pushed and also rebased on top of main. There is one change in a C++ file that appears to be generating a script, so make sure that is correct, as I don't have sufficient knowledge about that specific instance to know whether it's correct.