anchor.diff:      "--enable-sap"
       "--enable-health"
       "--enable-mesh"
  +    "--enable-midi"
  +    "--enable-btpclient"
       "--enable-manpages"
       "--enable-sixaxis"
     ];
  
positive.code:   baseUrl = "mirror://kernel/linux/bluetooth";
  in
  stdenv.mkDerivation rec {
    name = "bluez-5.49";
  
    src = fetchurl {
      url = "${baseUrl}/${name}.tar.xz";
      hashOutput = false;
      sha256 = "33301d7a514c73d535ee1f91c2aed1af1f2e53efe11d3ac06bcf0d7abed2ce95";
    };
  
    buildInputs = [
      dbus
      glib
      json-c
      libical
  
negative.code:   passthru = {
      srcVerification = fetchurl {
        failEarly = true;
        inherit (src)
          urls
          outputHash
          outputHashAlgo;
        fullOpts = {
          pgpsigUrl = "${baseUrl}/${name}.tar.sign";
          pgpDecompress = true;
          pgpKeyFingerprint = "E932 D120 BC2A EC44 4E55  8F01 06CA 9F5D 1DCF 2659";
        };
      };
    };
  
  