Chrooting freeradius 2.1.6

Hi, what exactly should be placed in directory which freeradius 2.1 chroots to? I tried to configure chrooted environment for freeradius and I had to place all rlm_*.so (along with dependencies) and dictionary.* files inside chroot directory because chroot() is called earlier than these files are read. Even if I put modules names in instantiate section, it doesn't help. Also, putting these files under current directory is not a solution due to modules dependencies. Am I doing something wrong or it is impossible to jail freeradius into empty (or containing only /dev/log and /dev/urandom devices) directory? IMHO, it would be more logical to chroot after all initialization work was done and all files have been read. Regards.