anchor.diff:  { stdenv
   , fetchurl
  +, lib
   
  -, xorg
  +, dri2proto
  +, libx11
  +, libxext
   , mesa_noglu
   }:
   
  
positive.code:   };
  
    buildInputs = [
      xorg.dri2proto
      xorg.libX11
      xorg.libXext
    ];
  
    configureFlags = [
  
negative.code:     };
    };
  
    meta = with lib; {
      description = "VDPAU wrapper and trace libraries";
      homepage = https://people.freedesktop.org/~aplattner/vdpau/;
      license = licenses.mit;
  