Percona 2.4 (S3 streaming backup) on 14.04?

I’m moving a mySQL instance to RDS via S3 on a 14.04 instance, and I don’t seem to be able to get xtra backup-24 over apt, only the older version (2.1.8) - is this the latest version that’ll work? It’s a big beast, so I was hoping to stream directly.