anchor.diff:  
     buildInputs = [
       aalib
  -    alsaLib
  +    alsa-lib
       ffmpeg
       flac
       fontconfig
  
positive.code: , libdvdcss
  , libmng
  , libmodplug
  , libmpcdec
  , libpulseaudio
  , libtheora
  , libv4l
  , libvdpau
  , libvorbis
  , libvpx
  , mesa
  , speex
  , vcdimager
  , wavpack
  , xorg
  , zlib
  
negative.code:     #--with-external-dvdnav  Use external dvdnav library (not recommended)
      "--with-imagemagick"
      "--with-libflac"
      #"--with-speex"
      "--with-theora"
      "--with-vorbis"
      "--with-wavpack"
  