I can't make it work on nixos. Kernel 7.0.1

I tried fixing the paths and even linking `/bin/bash` to the nix /run/current-system/sw/bin/bash

/etc/passwd is unmodified.

Can anyone else try? CopyFail1 did not work because `su` is only executable, not readable, CopyFail2 worked only partially (changes /etc/passwd but the user is not passwordless)