anchor.diff:  }:
   
   let
  -  inherit (stdenv.lib)
  -    enFlag
  -    wtFlag;
  +  inherit (lib)
  +    boolEn
  +    boolWt;
  +
  +  version = "0.6.32";
   in
  -
   stdenv.mkDerivation rec {
     name = "avahi-${version}";
  -  version = "0.6.32";
   
     src = fetchurl {
       url = "https://github.com/lathiat/avahi/archive/v${version}.tar.gz";
  
positive.code:       ln -sv avahi-compat-howl.pc $out/lib/pkgconfig/howl.pc
      '';
  
    meta = with stdenv.lib; {
      description = "Facilitates service discovery on a local network";
      homepage = http://avahi.org;
      license = licenses.lgpl2Plus;
  
negative.code:   configureFlags = [
      "--localstatedir=/var"
      "--enable-nls"
      "--${boolEn (glib != null)}-glib"
      "--${boolEn (glib != null)}-gobject"
      # Disable all builtin interfaces
      "--disable-qt3"
      "--disable-qt4"
      "--disable-gtk"
      "--disable-gtk3"
      "--${boolEn (dbus != null)}-dbus"
      "--disable-dbm"
      "--disable-gdbm"
      "--${boolEn (libdaemon != null)}-libdaemon"
      "--disable-python"
      # Circular dependency:
      # avahi -> pygtk -> gtk2 -> cups -> avahi
  