anchor.diff:  { stdenv
   , fetchurl
   
  +, alsa-lib
   , dbus
  +, ell
   , glib
   , json-c
   , libical
  
positive.code:   passthru = {
      srcVerification = fetchurl {
        failEarly = true;
        pgpsigUrl = "${baseUrl}/${name}.tar.sign";
        pgpDecompress = true;
        pgpKeyFingerprint = "E932 D120 BC2A EC44 4E55  8F01 06CA 9F5D 1DCF 2659";
        inherit (src) urls outputHash outputHashAlgo;
      };
    };
  
  
negative.code:     "--enable-sap"
      "--enable-health"
      "--enable-mesh"
      "--enable-midi"
      "--enable-btpclient"
      "--enable-manpages"
      "--enable-sixaxis"
    ];
  