anchor.diff:  
     buildInputs = [
       eglexternalplatform
  +    libGL
       libX11
       mesa
  -    libGL
       wayland
  +    wayland-protocols
     ];
   
     postFixup = ''
  
positive.code: , meson
  , ninja
  , wayland-scanner
  , libX11
  , mesa
  , libGL
  , wayland
  }:
  
  let
  
negative.code: 
  in stdenv.mkDerivation rec {
    pname = "egl-wayland";
    version = "1.1.9";
  
    outputs = [ "out" "dev" ];
  
  