anchor.diff:  
     doCheck = false;
   
  -  meta = {
  +  meta = with stdenv.lib; {
       homepage = "http://musicbrainz.org/doc/MusicBrainz_Picard";
       description = "The official MusicBrainz tagger";
  -    license = stdenv.lib.licenses.gpl2;
  +    maintainers = with maintainers; [ emery ];
  +    license = licenses.gpl2;
  +    platforms = platforms.all;
     };
   }
  
positive.code: 
    src = fetchurl {
      url = "http://ftp.musicbrainz.org/pub/musicbrainz/picard/${name}.tar.gz";
      md5 = "d1086687b7f7b0d359a731b1a25e7b66";
    };
  
    postPatch = let
      fpr = "${acoustidFingerprinter}/bin/acoustid-fingerprinter";
    in ''
      sed -ri -e 's|(TextOption.*"acoustid_fpcalc"[^"]*")[^"]*|\1${fpr}|' \
        picard/ui/options/fingerprinting.py
    '';
  
    buildInputs = [
  
negative.code: { stdenv, fetchurl, pythonPackages, gettext, pyqt4
  , pkgconfig, libdiscid, libofa, ffmpeg, chromaprint
  }:
  
  pythonPackages.buildPythonPackage rec {
  