Created attachment 544690 [details] dev-libs/keystone-0_p20160727.ebuild Added git tag so it can update, *might* fix bug 652440, can use it for -9999.
0_p20160727 is a lower version than the current 0.9.1. Maybe you should go for 0.9.1._p20160727 instead.
Version 0.9.2 is now in tree which is more recent.