anchor.diff:      sha256 = "1xbwva12l68awplardf47ydlx904wifw468npaxa9cx9dvd5mv13";
     };
   
  -  nativeBuildInputs = [ pkgconfig autoreconfHook nasm ];
  +  nativeBuildInputs = [ pkgconfig autoreconfHook nasm makeWrapper ];
     buildInputs = [
       zimg libass
       (python3.withPackages (ps: with ps; [ sphinx cython ]))
  
positive.code: 
    enableParallelBuilding = true;
  
    meta = with stdenv.lib; {
      description = "A video processing framework with the future in mind";
      homepage    = http://www.vapoursynth.com/;
      license     = licenses.lgpl21;
      platforms   = platforms.x86_64;
      maintainers = with maintainers; [ rnhmjoj ];
    };
  
  }
  
negative.code: { stdenv, fetchFromGitHub, pkgconfig, autoreconfHook, makeWrapper
  , zimg, libass, python3, libiconv
  , ApplicationServices, nasm
  , ocrSupport ?  false, tesseract ? null
  