anchor.diff:      libxslt
       docbook_xml_dtd_42
       docbook_xml_dtd_43
  -    docbook_xml_ebnf_dtd
       docbook_xml_xslt
       subversion
       pan
  
positive.code: 
    body = [
      i686LinuxPkgs
      powerpcDarwinPkgs
    ];
  }
  
negative.code: let {
  
    allPackages = import ./all-packages.nix;
  
    i686LinuxPkgs = {inherit (allPackages {system = "i686-linux";})
      coreutils
      findutils
      diffutils
  