You need the binary calibre installation from the developer's website. A common problem with linux distros
is that miost software will be out of date. calibre is released weekly.
You *could* get around that by running Arch Linux or Gentoo (I use Arch). Or use the self-contained binaries at
http://calibre-ebook.com/download_linux -- or see my
Fully automatic calibre installer/updater for linux 