git.eclass adds the dependency. mesa-7.2 has the fix. (I'm assuming git isn't required if $PV != 9999)
It should now be properly fixed. Please let me know if it's not the case. Thanks :)
Umhm, ekhm, I may be wrong, I was told anyway that conditional inherits in ebuilds may be forbidden.
Maciej, It depends on the condition. If it doesn't break the cache, it's fine.