anchor.diff:  }:
   
   let
  -  version = "2017-08-01";
  +  version = "2018-01-31";
   in
   stdenv.mkDerivation rec {
     name = "egl-wayland-${version}";
   
     src = fetchFromGitHub {
  -    version = 3;
  +    version = 6;
       owner = "NVIDIA";
       repo = "egl-wayland";
  -    rev = "1f4b1fde684595fe28e250b7429e028a7bb7d40d";
  -    sha256 = "b84943ef5b555cb08ef3daa068c217963977ddfd6617c1aca219d766b9ecc0a7";
  +    rev = "68ffe6fff49fff7667e8bab5b743c3e6c1950a6f";
  +    sha256 = "89f67cc9fd6082466d75449d3b496f2eae3e9dc0fe0f8b79d49c444e6acab9f2";
     };
   
     nativeBuildInputs = [
  -    autoreconfHook
  +    meson
  +    ninja
     ];
   
     buildInputs = [
  
positive.code: { stdenv
  , autoreconfHook
  , fetchFromGitHub
  , lib
  
  #, egl-headers
  , eglexternalplatform
  
negative.code:     opengl-dummy
      wayland
      xorgproto
    ];
  
    meta = with lib; {
  