args:
( args.mkDerivationByConfiguration {
    flagConfig = {
    mandatory = { implies = [ "no_oss" "no_sun_audio" ]; };
    # are these options of interest? We'll see
    #--disable-fftw          disable usage of FFTW
    #--enable-debug          enable debugging
    #--disable-cpu-clip      disable tricky cpu specific clipper
    alsa =              { cfgOption = "--enable-alsa"; buildInputs = "alsa"; };
    no_alsa = { cfgOption = "--disable-alsa"; };
    libao =             { cfgOption = "--enable-libao"; buildInputs = "libao"; };
    no_libao = { cfgOption = "--disable-libao"; };
    #oss =               { cfgOption = "--enable-oss"; buildInputs = "oss"; };
    no_oss = { cfgOption = "--disable-oss"; };
    #sun_audio =         { cfgOption = "--enable-sun-audio"; buildInputs = "sun_audio"; };
    no_sun_audio = { cfgOption = "--disable-sun_audio"; };

    # These options should be autodetected by the configure script 
    /*
    --without-sndfile       Don't try to use libsndfile
    --without-ogg           Don't try to use Ogg Vorbis
    --without-flac          Don't try to use FLAC
    --without-ffmpeg        Don't try to use ffmpeg
    --without-mad           Don't try to use MAD (MP3 Audio Decoder)
    --without-lame          Don't try to use LAME (LAME Ain't an MP3 Encoder)
    --without-amr-wb        Don't try to use amr-wb
    --without-amr-nb        Don't try to use amr-nb
    --without-samplerate    Don't try to use libsamplerate (aka Secret Rabbit
                            Code)
    --without-ladspa        Don't try to use LADSPA
    --with-ladspa-path      Default search path for LADSPA plugins
    */
  };

  optionals = [ "libsndfile" "libogg" "flac" "ffmpeg" "libmad" "lame" 
                 /* "amr-wb" "amr-nb" */ 
                "libsamplerate" /* "ladspa" */ ];


    extraAttrs = co : {
      name = "sox-14.0.0";

      src = args.fetchurl {
        url = mirror://sourceforge/sox/sox-14.0.0.tar.gz;
        sha256 = "1l7v04nlvb96y0w9crvm6nq8g50yxp3bkv6nb1c205s982inlalc";
      };

    meta = {
      description = "Sample Rate Converter for audio";
      homepage = http://www.mega-nerd.com/SRC/index.html;
      # you can choose one of the following licenses:
      license = [ "GPL"
                  { url=http://www.mega-nerd.com/SRC/libsamplerate-cul.pdf;
                    name="libsamplerate Commercial Use License";
                  } ];
    };
  };
} ) args