anchor.diff: -{ stdenv, fetchurl, cmake, libpcap, libnet, zlib, curl, pcre,
  +{ stdenv, fetchFromGitHub, cmake, libpcap, libnet, zlib, curl, pcre,
     openssl, ncurses, glib, gtk, atk, pango, flex, bison }:
   
   stdenv.mkDerivation rec {
     name = "ettercap-${version}";
  -  version = "0.8.0";
  +  version = "0.8.1";
   
  -  src = fetchurl {
  -    url = "https://github.com/Ettercap/ettercap/archive/v${version}.tar.gz";
  -    sha256 = "1g69782wk2hag8h76jqy81szw5jhvqqnn3m4v0wjkbv9zjxy44w0";
  +  src = fetchFromGitHub {
  +    owner = "Ettercap";
  +    repo = "ettercap";
  +    rev = "v${version}";
  +    sha256 = "017398fiqcl2x1bjfnz97y6j8v5n83gbsniy73vbx21kmhh5pacg";
     };
   
     buildInputs = [
  
positive.code:     "-DGTK2_GDKCONFIG_INCLUDE_DIR=${gtk}/lib/gtk-2.0/include"
    ];
  
    meta = {
      description = "Comprehensive suite for man in the middle attacks";
      homepage = http://ettercap.github.io/ettercap/;
      license = stdenv.lib.licenses.gpl2;
      platforms = stdenv.lib.platforms.unix;
    };
  }
  
negative.code:   ];
  
    preConfigure = ''
      substituteInPlace CMakeLists.txt --replace /etc \$\{INSTALL_PREFIX\}/etc \
                                       --replace /usr \$\{INSTALL_PREFIX\}
    '';
  
    cmakeFlags = [
  