anchor.diff:  , sqlite
   , systemd_lib
   #, twolame
  -#, wavpack
  +, wavpack
   , yajl
   , zlib
   , zziplib
  
positive.code: stdenv.mkDerivation rec {
    name = "mpd-${version}";
    versionMajor = "0.19";
    versionMinor = "15";
    version = "${versionMajor}.${versionMinor}";
  
    src = fetchurl {
      url    = "https://www.musicpd.org/download/mpd/${versionMajor}/${name}.tar.xz";
      sha256 = "0cb9a223894b038ce966ce6d651d9b3ea3bdc7d7b9bec8d1e9e7e091cbc29b8b";
    };
  
    buildInputs = [
  
negative.code:     soxr
      sqlite
      systemd_lib
      wavpack
      yajl
      zlib
      zziplib
  