weston-1.8.0 was released in June. Reproducible: Always
Fixed by commit 6bb20c0472e7436cfde5bfe52b618a317ccf6f07 Author: Matt Turner <mattst88@gentoo.org> Date: Sat Aug 29 17:33:52 2015 -0700 dev-libs/weston: Version bump to 1.8.1. ... which contains a typo.