anchor.diff:        cp -prv * $out
       '';
   
  -    meta = {
  -      license = "unfree";
  -    };
  +    meta.license = "unfree";
     } else null;
   
   in
  
positive.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"}
  
        ${optionalString (codecs != null) "--codecsdir=${codecs}"}
        ${optionalString (stdenv.isi686 || stdenv.isx86_64) "--enable-runtime-cpudetection"}
        --enable-freetype
        --disable-xanim
  
negative.code: , pulseSupport ? false, pulseaudio ? null
  # For screenshots
  , libpngSupport ? true, libpng ? null
  , useUnfreeCodecs ? false
  }:
  
  assert x11Support -> (libX11 != null && libXext != null && mesa != null);
  