anchor.diff:  in stdenv.mkDerivation rec {
     name = "dirb-${version}";
     version = "${major}.${minor}";
  +
     src = fetchurl {
       url = "mirror://sourceforge/dirb/${version}/dirb${major}${minor}.tar.gz";
       sha256 = "0b7wc2gvgnyp54rxf1n9arn6ymrvdb633v6b3ah138hw4gg8lx7k";
     };
  +
  +  nativeBuildInputs = [ autoreconfHook ];
  +  buildInputs = [ curl ];
   
     unpackPhase = ''
       tar -xf $src
  
positive.code:     export sourceRoot="dirb222"
    '';
  
    buildInputs = [ automake autoconf curl ];
    preConfigure = "chmod +x configure";
  
    meta = {
      description = "A web content scanner";
  
negative.code: { fetchurl, stdenv, autoreconfHook, curl }:
  
  let
    major = "2";
  