{ lib, pkgs, ... }: { environment = { systemPackages = with pkgs; [ ### Dev Tools ### git ### System Utilities ### btop fastfetch helix nixos-firewall-tool nvd sysz tmux wget yazi ]; shellAliases = { cat = "${lib.getExe pkgs.bat} --paging=never --style=plain"; ls = "${lib.getExe pkgs.eza} --icons --group-directories-first"; tree = "ls --tree"; }; }; programs = { command-not-found.enable = false; fish.enable = true; }; }