Hi, Yes, this is expected. The kernel build process was changed a few releases ago to build in two phases: first the modules, then the kernel itself. The initramfs image is built during the second phase where it can include the pre-built modules, and that is where the config option now gets set. See:
https://github.com/coreos/coreos-overlay/blob/master/sys-kernel/coreos-kernel/coreos-kernel-4.7.3.ebuild#L62 Thanks. David
