anchor.diff:    # Hacky framework patching technique borrowed from the phantomjs2 package
     postInstall = optionalString qtFaststartProgram ''
       cp -a tools/qt-faststart $out/bin/
  +  '';
  +
  +  postFixup = optionalString stdenv.isLinux ''
  +    # Set RUNPATH so that libnvcuvid and libcuda in /run/opengl-driver(-32)/lib can be found.
  +    # See the explanation in addOpenGLRunpath.
  +    addOpenGLRunpath $out/lib/libavcodec.so
  +    addOpenGLRunpath $out/lib/libavutil.so
     '';
   
     enableParallelBuilding = true;
  
positive.code: { stdenv, fetchurl, fetchpatch, pkgconfig, perl, texinfo, yasm
  /*
   *  Licensing options (yes some are listed twice, filters and such are not listed)
   */
  
negative.code:     "--enable-cross-compile"
    ];
  
    nativeBuildInputs = [ addOpenGLRunpath perl pkgconfig texinfo yasm ];
  
    buildInputs = [
      bzip2 celt dav1d fontconfig freetype frei0r fribidi game-music-emu gnutls gsm
  