anchor.diff:      "--with-http_secure_link_module"
       # Install destination problems
       # "--with-http_perl_module"
  -  ] ++ stdenv.lib.optional fullWebDAV "--add-module=${dav-ext}";
  +  ] ++ stdenv.lib.optional fullWebDAV "--add-module=${dav-ext}"
  +    ++ stdenv.lib.optional syslog "--add-module=${syslog-ext}";
   
     preConfigure = ''
       export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE -I${libxml2}/include/libxml2"
  
positive.code: { stdenv, fetchurl, fetchgit, openssl, zlib, pcre, libxml2, libxslt, expat, fullWebDAV ? false }:
  
  let
    dav-ext = fetchgit {
      url = git://github.com/arut/nginx-dav-ext-module.git;
      rev = "54cebc1f21fc13391aae692c6cce672fa7986f9d";
      sha256 = "1dvpq1fg5rslnl05z8jc39sgnvh3akam9qxfl033akpczq1bh8nq";
    };
  in
  
  
negative.code: 
    buildInputs = [ openssl zlib pcre libxml2 libxslt ] ++ stdenv.lib.optional fullWebDAV expat;
  
    patches = if syslog then [ "${syslog-ext}/syslog_1.4.0.patch" ] else [];
  
    configureFlags = [
      "--with-http_ssl_module"
      "--with-http_xslt_module"
  