anchor.diff:  , libsndfile
   , jack2_lib
   , lirc
  -, openssl_1-0-2
  +, openssl
   , sbc
   , soxr
   , speexdsp
  
positive.code:   # FIXME
    buildDirCheck = false;
  
    meta = with stdenv.lib; {
      description = "Sound server for POSIX and Win32 systems";
      homepage = http://www.pulseaudio.org/;
  
negative.code:     avahi
      jack2_lib
      lirc
      openssl
      soxr
      systemd_lib
      webrtc-audio-processing
  