anchor.diff:      "test=0"
       (scFlag "shoutcast" (libshout != null))
       (scFlag "opus" (libopus != null))
  -    (scFlag "ffmpeg" (ffmpeg != null))
  +    (scFlag "ffmpeg" (ffmpeg_2_2 != null))
       "optimize=portable"
       "autodjcrates=1"
       "macappstore=0"
  
positive.code: 
  , chromaprint
  , faad2
  , ffmpeg
  , fftw
  , flac
  , libid3tag
  
negative.code:   buildInputs = [
      chromaprint
      faad2
      ffmpeg_2_2
      fftw
      flac
      libid3tag
  