There are several alternate content servers in the
Related Tools forum.
In general it is not a good idea to use a distro's package for calibre. They are usually out of date, sometimes many months or even years so. Sometimes they contain errors. Lastly, nobody here will support them.
I run calibre's content server on a headless VPS using xvfb, behind apache in reverse proxy mode so apache handles security. Works beautifully.