Log Message:
go-genproto: remove BROKEN

The message says that the package tries to modify .buildlink/gopkg. However,
that's (semi-)normal and expected.

non-module Go builds will rebuild any of their dependencies if any of _their_
dependencies or sources are newer. If you "make replace" a Go package \ 
higher
in the food chain and then build a lower one, the go tool will rebuild some
of its dependencies.

This is harmless, since the .buildlink entries are just links.