The py27-apsw

Hi,

Iam trying to install calibre on freenas.
Created the jail and on shell i did pkg install calibre but i had this info:

The py27-apsw port currently does not have a maintainer. As a result, it is
more likely to have unresolved issues, not be up-to-date, or even be removed in the future

Also i have others error: "sysctl: unknown oid 'compat.linux.osrelease'
linuxulator is not (kld)loaded, exiting
pkg: PRE-INSTALL script failed "

I cannot run calibre.