anchor.diff:      '';
   
     NIX_LDFLAGS = stdenv.lib.optionalString x11Support "-lX11 -lXext";
  +
  +  enableParallelBuilding = true;
   
     # Provide a reasonable standard font.  Maybe we should symlink here.
     postInstall =
  
positive.code:       cp -prv * $out
      '';
  
      meta = {
        license = "unfree";
      };
    } else null;
  
  in
  
negative.code:       ${if x264Support then "--enable-x264 --disable-x264-lavc" else "--disable-x264 --enable-x264-lavc"}
        ${if jackaudioSupport then "--enable-jack" else "--disable-jack"}
        ${if pulseSupport then "--enable-pulse" else "--disable-pulse"}
        ${optionalString (useUnfreeCodecs && codecs != null) "--codecsdir=${codecs}"}
        ${optionalString (stdenv.isi686 || stdenv.isx86_64) "--enable-runtime-cpudetection"}
        --enable-freetype
        --disable-xanim
  