anchor.diff:      pythonPackages.gst-python
       pythonPackages.pygobject3
       gobject-introspection
  -  ] ++ optional enableAcoustid      pythonPackages.pyacoustid
  +  ] ++ optional enableAbsubmit      essentia-extractor
  +    ++ optional enableAcoustid      pythonPackages.pyacoustid
       ++ optional (enableFetchart
                 || enableEmbyupdate
                 || enableKodiupdate
  
positive.code:   };
  
    pluginsWithoutDeps = [
      "absubmit" "beatport" "bench" "bpd" "bpm" "bucket" "cue" "duplicates"
      "edit" "embedart" "export" "filefilter" "freedesktop" "fromfilename"
      "ftintitle" "fuzzy" "hook" "ihate" "importadded" "importfeeds" "info"
      "inline" "ipfs" "lyrics" "mbcollection" "mbsubmit" "mbsync" "metasync"
      "missing" "permissions" "play" "plexupdate" "random" "rewrite" "scrub"
      "smartplaylist" "spotify" "the" "types" "zero"
    ];
  
    enabledOptionalPlugins = attrNames (filterAttrs (_: id) optionalPlugins);
  
negative.code: 
  let
    optionalPlugins = {
      absubmit = enableAbsubmit;
      acousticbrainz = enableAcousticbrainz;
      badfiles = enableBadfiles;
      chroma = enableAcoustid;
  