anchor.diff:  { stdenv, fetchFromGitHub, cmake, libpcap, libnet, zlib, curl, pcre
  -, openssl, ncurses, glib, gtk3, atk, pango, flex, bison, geoip
  +, openssl, ncurses, glib, gtk3, atk, pango, flex, bison, geoip, harfbuzz
   , pkgconfig }:
   
   stdenv.mkDerivation rec {
  
positive.code:     "-DGTK3_GLIBCONFIG_INCLUDE_DIR=${glib.out}/lib/glib-2.0/include"
    ];
  
    meta = with stdenv.lib; {
      description = "Comprehensive suite for man in the middle attacks";
      homepage = http://ettercap.github.io/ettercap/;
  
negative.code:   nativeBuildInputs = [ cmake flex bison pkgconfig ];
    buildInputs = [
      libpcap libnet zlib curl pcre openssl ncurses
      glib gtk3 atk pango geoip harfbuzz
    ];
  
    preConfigure = ''
  