{ config, lib, pkgs, ... }:
let inherit (lib) fileContents;
in
{
  nix.package = pkgs.nixFlakes;

  nix.systemFeatures = [ "nixos-test" "benchmark" "big-parallel" "kvm" ];

  environment = {
    systemPackages = with pkgs; [
      binutils
      coreutils
      curl
      deploy-rs
      direnv
      dnsutils
      dosfstools
      fd
      fzf
      git
      bat
      neovim
      gotop
      gptfdisk
      iputils
      jq
      manix
      moreutils
      nix-index
      tmux
      nmap
      ripgrep
      whois

      imagemagick
      youtube-dl
      ffmpeg

      libqalculate
    ];
  };

  fonts = {
    fonts = with pkgs; [ powerline-fonts dejavu_fonts ];
    fontconfig.defaultFonts = {
      monospace = [ "DejaVu Sans Mono for Powerline" ];
      sansSerif = [ "DejaVu Sans" ];
    };
  };

  nix = {
    autoOptimiseStore = true;
    gc.automatic = true;
    optimise.automatic = true;
    useSandbox = true;
    allowedUsers = [ "@wheel" ];
    trustedUsers = [ "root" "@wheel" ];
    extraOptions = ''
      keep-outputs = true
      keep-derivations = true
      fallback = true
    '';

  };

  time.timeZone = "Europe/Warsaw";
  i18n.defaultLocale = "en_US.UTF-8";

  services.earlyoom.enable = true;
  users.mutableUsers = false;
}