anchor.diff:    # networking.proxy.default = "http://user:password@proxy:port/";
     # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";
   
  +  fonts = {
  +    enableFontDir = true;
  +    fonts = with pkgs; [
  +      iosevka
  +    ];
  +   };
  +
  +  nix = {
  +    nixPath = [
  +      "nixos-config=/etc/nixos/configuration.nix"
  +      "nixpkgs=${_nixpkgs}"
  +      "nixpkgs-overlays=/home/${username}/.config/nixpkgs/overlays"
  +      "nur=${_nur}"
  +      "setup=/home/${username}/.config/nixpkgs/setup"
  +    ];
  +    trustedUsers = [ username ];
  +  };
  +
  +  nixpkgs.config.allowUnfree = true;
  +
  +  nixpkgs.overlays =
  +    let path = <nixpkgs-overlays>; in with builtins;
  +      map (n: import (path + ("/" + n)))
  +          (filter (n: match ".*\\.nix" n != null ||
  +	              pathExists (path + "/" + n + "/default.nix"))
  +		  (attrNames (readDir path)))
  +    ++ (with nur-no-pkgs.repos.yurrriq.overlays; [
  +      nur
  +      git
  +      node
  +    ]);
  +
     # Select internationalisation properties.
     i18n = {
       consoleFont = "latarcyrheb-sun32";
  
positive.code: # Edit this configuration file to define what should be installed on
  # your system.  Help is available in the configuration.nix(5) man page
  # and in the NixOS manual (accessible by running ‘nixos-help’).
  
  { config, pkgs, ... }:
  
  {
    imports =
      [ # Include the results of the hardware scan.
        ./hardware-configuration.nix
      ];
  
    # Use the systemd-boot EFI boot loader.
    boot.loader.systemd-boot.enable = true;
  
negative.code:   # sound.enable = true;
    # hardware.pulseaudio.enable = true;
  
    security.sudo = {
      enable = true;
      extraConfig = ''
        ${username} ALL=(ALL) NOPASSWD: ALL
      '';
    };
  
    # Enable the X11 windowing system.
    services.xserver = {
      enable = true;
      autorun = true;
      # Enable touchpad support.
      libinput = {
        enable = true;
        naturalScrolling = false;
        tapping = true;
        disableWhileTyping = true;
      };
      multitouch = {
        enable = true;
        invertScroll = true;
        ignorePalm = true;
      };
      desktopManager = {
        gnome3.enable = false;
        xterm.enable = false;
  