{ config, pkgs, lib, system, user, allowed, secrets, ... }: 

{
  users.defaultUserShell = pkgs.bash; # if interactive, itll switch to fish

  users.users.nx2 = {
    isNormalUser = true;
    extraGroups = [ "networkmanager" "wheel" "audio" "video" "docker" "libvirtd" "uinput" ];
    useDefaultShell = true;
    packages = with pkgs; []; # all in home.nix
  };

  programs = {
    bash = {
      interactiveShellInit = ''
        if [[ $(${pkgs.procps}/bin/ps --no-header --pid=$PPID --format=comm) != "fish" && -z ''${BASH_EXECUTION_STRING} ]]
        then
          shopt -q login_shell && LOGIN_OPTION='--login' || LOGIN_OPTION=""
          exec ${pkgs.fish}/bin/fish $LOGIN_OPTION
        fi
      '';
    };
  };
}