anchor.diff: -{ stdenv, fetchFromGitHub, automake, autoreconfHook, asciidoc, libxml2, libxslt }:
  +{ stdenv, fetchFromGitHub, automake, autoreconfHook, asciidoc, libxml2,
  +  libxslt, docbook_xsl }:
   
   stdenv.mkDerivation rec{
     name = "tinyproxy-${version}";
  
positive.code:   postConfigure = ''
      substituteInPlace docs/man5/Makefile --replace \
            "-f manpage" \
            "-f manpage \\
             -L"
      substituteInPlace docs/man8/Makefile --replace \
            "-f manpage" \
            "-f manpage \\
             -L"
    '';
  
  
negative.code:     owner = "tinyproxy";
    };
  
    nativeBuildInputs = [ autoreconfHook asciidoc libxml2 libxslt docbook_xsl ];
  
    # -z flag is not supported in darwin
    preAutoreconf = stdenv.lib.optionalString stdenv.isDarwin ''
  