anchor.diff:  { stdenv
   , fetchurl
   
  +, liblinear
   , libpcap
  +, libssh2
  +, lua
   , openssl
   , pcre
   , python2Packages
  
positive.code:   ];
  
    buildInputs = [
      libpcap
      openssl
      pcre
      python2Packages.python
  
negative.code:   ];
  in
  stdenv.mkDerivation rec {
    name = "nmap-7.70";
  
    src = fetchurl {
      urls = map (n: "${n}/${name}.tar.bz2") baseUrls;
      multihash = "QmdByChZAjZradH73dAockfRumaEpgA3X7DqAeLA4kabMb";
      hashOutput = false;
      sha256 = "847b068955f792f4cc247593aca6dc3dc4aae12976169873247488de147a6e18";
    };
  
    nativeBuildInputs = [
  