anchor.diff: -{ stdenv, fetchurl, gettext, ncurses, openssl }:
  +{ stdenv, fetchurl, gettext, ncurses, openssl
  +, fftw ? null }:
   
   stdenv.mkDerivation rec {
     name = "httping-${version}";
  
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:     sha256 = "1110r3gpsj9xmybdw7w4zkhj3zmn5mnv2nq0ijbvrywbn019zdfs";
    };
  
    buildInputs = [ fftw ncurses openssl ];
    nativeBuildInputs = [ gettext ];
  
    makeFlags = [
  