anchor.diff: -{ stdenv, fetchFromGitHub, cmake, perl
  -, file, glib, libevent, luajit, openssl, pcre, pkgconfig, sqlite, ragel, icu, libfann }:
  +{ stdenv, lib, fetchFromGitHub, cmake, perl
  +, file, glib, libevent, luajit, openssl, pcre, pkgconfig, sqlite, ragel, icu
  +, libfann, gd
  +, withFann ? true
  +, withGd ? false
  +}:
   
   let libmagic = file;  # libmagic provided by file package ATM
   in
  
positive.code:     "-DDBDIR=/var/lib/rspamd"
      "-DLOGDIR=/var/log/rspamd"
      "-DLOCAL_CONFDIR=/etc/rspamd"
    ];
  
    meta = with stdenv.lib; {
      homepage = https://github.com/vstakhov/rspamd;
  
negative.code:   };
  
    nativeBuildInputs = [ cmake pkgconfig perl ];
    buildInputs = [ glib libevent libmagic luajit openssl pcre sqlite ragel icu ]
      ++ lib.optional withFann libfann
      ++ lib.optional withGd gd;
  
    cmakeFlags = [
      "-DDEBIAN_BUILD=ON"
  