anchor.diff:  { stdenv, fetchFromGitHub, writeScript, glibcLocales
  -, pythonPackages, imagemagick
  +, pythonPackages, imagemagick, gobjectIntrospection, gst_all_1
   
   , enableAcousticbrainz ? true
   , enableAcoustid       ? true
  
positive.code:     runHook postInstallCheck
    '';
  
    meta = {
      description = "Music tagger and library organizer";
      homepage = http://beets.radbox.org;
  
negative.code:     nose
      rarfile
      responses
    ] ++ (with gst_all_1; [
      gst-plugins-base
      gst-plugins-good
      gst-plugins-ugly
    ]);
  
    patches = [
      ./replaygain-default-bs1770gain.patch
  