anchor.diff:  { stdenv
   , bison
  -, docbook2x
  -, docbook_xml_dtd_45
   , fetchurl
   , flex
   , lib
  
positive.code:   configureFlags = [
      "--sysconfdir=/etc"
      "--localstatedir=/var"
      "--without-mini-gmp"
      "--with-cli"
      "--with-xtables"
      "--with-json"
    ];
  
negative.code: }:
  
  stdenv.mkDerivation rec {
    name = "nftables-0.9.1";
  
    src = fetchurl {
      url = "http://netfilter.org/projects/nftables/files/${name}.tar.bz2";
      multihash = "QmYVNBforqq4SEdMr2xM2DvT6WkRSEDYDxwyMWYT9XwsM8";
      hashOutput = false;
      sha256 = "ead3bb68ed540bfbb87a96f2b69c3d65ab0c2a0c3f6e739a395c09377d1b4fce";
    };
  
    nativeBuildInputs = [
      bison
      flex
    ];
  
  