anchor.diff:      find . -type f -name GNUmakefile -exec sed -i "s:\\$.GNUSTEP_MAKEFILES.:$PWD/makefiles:g" {} +
     '';
   
  -  configureFlags = [ "--disable-debug" "--with-ssl=ssl" ];
  +  configureFlags = [
  +    "--disable-debug"
  +    "--with-ssl=ssl"
  +    "--enable-mfa"
  +  ];
   
     preFixup = ''
       # Create gnustep.conf
  
positive.code: { gnustep, lib, fetchFromGitHub, fetchpatch, makeWrapper, python3, lndir
  , openssl, openldap, sope, libmemcached, curl, libsodium, libytnef, libzip, pkg-config, nixosTests }:
  gnustep.stdenv.mkDerivation rec {
    pname = "SOGo";
    version = "5.3.0";
  
negative.code:   };
  
    nativeBuildInputs = [ gnustep.make makeWrapper python3 ];
    buildInputs = [ gnustep.base sope openssl libmemcached curl libsodium libytnef libzip pkg-config openldap oathToolkit ];
  
    patches = [
      # TODO: take a closer look at other patches in https://sources.debian.org/patches/sogo/ and https://github.com/Skrupellos/sogo-patches
  