Debian stable (jessie)
% rasterisk -x 'core show version'
Asterisk 11.13.1~dfsg-2+b1 built by buildd @ brahms on a x86_64 running Linux on 2015-01-05 21:34:10 UTC
Debian unstable (sid)
% rasterisk -x 'core show version'
Asterisk 13.1.0~dfsg-1.1 built by doko @ gb on a x86_64 running Linux on 2015-07-10 11:23:10 UTC