The latest version in portage is pre17. I modified it to make pre25 work. It compiles fine over here.
Created attachment 23018 [details] Ebuild
Nevermind, arch has been renamed to tla as I just found out. There is a newer version available for tla though. I'll try to create an ebuild and post it in a new bug. Shouldn't arch be removed from the portage tree? Or at least give a warning that tla is the tool to be used since June?
Wont Fix