anchor.diff:      ${pkgs.xorg.xset}/bin/xset r rate 200 50
       ${pkgs.xorg.xmodmap} ~/.Xmodmap
       '';
  +  };
  +  hardware.nvidia.prime = {
  +    sync.enable = true;
  +    intelBusId = "PCI:0:2:0";
  +    nvidiaBusId = "PCI:45:0:0";
     };
     services.autorandr = {
       enable = true;
  
positive.code: 
    nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [
      "dropbox"
      "skypeforlinux"
      "slack"
      "spotify"
  
negative.code: 
    services.xserver = {
      enable = true;
      videoDrivers = [ "nvidia" ];
      windowManager.xmonad = {
        enable = true;
        enableContribAndExtras = true;
  