anchor.diff:      sha256 = "1110r3gpsj9xmybdw7w4zkhj3zmn5mnv2nq0ijbvrywbn019zdfs";
     };
   
  -  buildInputs = [ ncurses openssl ];
  +  buildInputs = [ fftw ncurses openssl ];
     nativeBuildInputs = [ gettext ];
   
     makeFlags = [
  
positive.code:     inherit version;
      homepage = http://www.vanheusden.com/httping;
      description = "ping with HTTP requests";
      maintainers = with maintainers; [ nckx rickynils ];
      platforms = with platforms; linux;
    };
  }
  
negative.code: { stdenv, fetchurl, gettext, ncurses, openssl
  , fftw ? null }:
  
  stdenv.mkDerivation rec {
    name = "httping-${version}";
  