{ lib, pkgs, ... }: {

  users.groups.gandalf = { gid = 1000; };

  users.users.gandalf = {
    isNormalUser = true;
    home = "/home/gandalf";
    createHome = true;
    group = "gandalf";
    extraGroups = [ "wheel" ];
    shell = pkgs.zsh;
  };

  programs.zsh = {
    enable = true;
    ohMyZsh = {
      enable = true;
      theme = "half-life";
    };
    syntaxHighlighting.enable = true;
    enableCompletion = true;
    autosuggestions.enable = true;
    shellAliases = {
      ls = "${pkgs.eza}/bin/eza --group-directories-first --hyperlink --icons";
      la =
        "${pkgs.eza}/bin/eza --group-directories-first --hyperlink --icons -la";
      ll =
        "${pkgs.expect}/bin/unbuffer ${pkgs.eza}/bin/eza --group-directories-first --hyperlink --icons -la | ${pkgs.less}/bin/less -r";
      lt =
        "${pkgs.eza}/bin/eza --group-directories-first --hyperlink --icons -la --tree";
      llt =
        "${pkgs.expect}/bin/unbuffer ${pkgs.eza}/bin/eza --group-directories-first --hyperlink --icons -la --tree | ${pkgs.less}/bin/less -r";
    };
  };

  environment.systemPackages = [
    (pkgs.writeShellScriptBin "n" ''
      set -euo pipefail
      action=$(${pkgs.gum}/bin/gum choose switch test clean)
      target=$(${pkgs.gum}/bin/gum choose PABU APPA MOMO)
      case "$action" in
        "clean")
          case "$target" in
            "PABU")
              gum log -t kitchen -l info "Running: sudo nix-collect-garbage -d && nix store gc && nix-store --optimise"
              sudo nix-collect-garbage -d && nix store gc && nix-store --optimise
              ;;
            *)
              gum log -t kitchen -l info "Running: ssh $target \"nix-collect-garbage -d && nix store gc && nix-store --optimise\""
              ssh $target "nix-collect-garbage -d && nix store gc && nix-store --optimise"
              ;;
          esac
          ;;
        *)
          case "$target" in
            "PABU")
              gum log -t kitchen -l info "Running: sudo nixos-rebuild $action --option sandbox false --flake .#PABU"
              sudo nixos-rebuild $action --option sandbox false --flake .#PABU
              ;;
            *)
              gum log -t kitchen -l info "Running: nixos-rebuild $action --build-host $target --target-host $target --flake .#$target"
              nixos-rebuild $action --build-host $target --target-host $target --flake .#$target
              ;;
          esac
          ;;
      esac
    '')
  ];

}