anchor.diff:    # List packages installed in system profile. To search by name, run:
     # $ nix-env -qaP | grep wget
     # environment.systemPackages = with pkgs; [
  -  #   wget
  +  #   wget vim
     # ];
  +
  +  # Some programs need SUID wrappers, can be configured further or are
  +  # started in user sessions.
  +  # programs.bash.enableCompletion = true;
  +  # programs.mtr.enable = true;
  +  # programs.gnupg.agent = { enable = true; enableSSHSupport = true; };
   
     # List services that you want to enable:
   
  
positive.code:   # services.xserver.layout = "us";
    # services.xserver.xkbOptions = "eurosign:e";
  
    # Enable the KDE Desktop Environment.
    # services.xserver.displayManager.sddm.enable = true;
    # services.xserver.desktopManager.plasma5.enable = true;
  
negative.code:   #   uid = 1000;
    # };
  
    # This value determines the NixOS release with which your system is to be
    # compatible, in order to avoid breaking some software such as database
    # servers. You should change this only after NixOS release notes say you
    # should.
    system.stateVersion = "16.03"; # Did you read the comment?
  
  }
  