anchor.diff:        wkennington
       ];
       platforms = with platforms;
  -      i686-linux
  -      ++ x86_64-linux;
  +      x86_64-linux;
     };
   }
  
positive.code:     "--with-lzma=${xz}"
    ];
  
    meta = with stdenv.lib; {
      homepage = http://xmlsoft.org/;
      description = "An XML parsing library for C";
  
negative.code: }:
  
  let
    version = "2.9.4";
  
    tarballUrls = version: [
      "http://xmlsoft.org/sources/libxml2-${version}.tar.gz"
    ];
  in
  stdenv.mkDerivation rec {
    name = "libxml2-${version}";
  
    src = fetchurl {
      urls = tarballUrls version;
      allowHashOutput = false;
      sha256 = "ffb911191e509b966deb55de705387f14156e1a56b21824357cdf0053233633c";
    };
  
    buildInputs = [
  