So, since automake-1.10 is the default, it would install automake-1.9* in another slot. I've manually changed the dependency and re-digested the ebuild. Then "emerge coreutils" just emerged fine ..
no real information here as to what the problem is you're experiencing post `emerge --info` and actual build errors
It's not really a problem, just redundant to install another version of automake in another slot, if it isn't needed.. I don't know why coreutils depends on automake-1.9* : I don't know if automake-1.10* fails in some cases. For me automake-1.10* worked fine.
please be a little more clear in your bug report next time: coreutils-6.9-r1 has =automake-1.9 in DEPEND even though it will build with automake-1.10+