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