joschi [1] filed a deletion request for cassandra-11 [2]: Ancient version of Apache Cassandra. There are 3 packages in AUR which represent all version lines still officially supported: https://aur.archlinux.org/packages/cassandra/ https://aur.archlinux.org/packages/cassandra-1.2/ https://aur.archlinux.org/packages/cassandra-2.0/ [1] https://aur.archlinux.org/account/joschi/ [2] https://aur.archlinux.org/pkgbase/cassandra-11/