Seriously this completely defeats the whole point of the information in pkg_postinst. einfo is not logged by ELOG features by default, producing the following: <snip> * You have installed dhcpcd with zeroconf support. * You have installed dhcpcd with DUID support. * Some DHCP server implementations require a MAC address only in the * ClientID field. These DHCP servers should be updated to be RFC * conformant. If you cannot do this, you can revert to the old * behaviour by using the -I '' option OR building dhcpcd with the * vram USE flag enabled. * GNU info directory index is up-to-date. </snip> The whole info about USE="zeroconf" gets lost, and half of info about USE="-vram" as well.
Maybe portage should just map einfo to elog when in pkg_postinst because you're basically saying that einfo is redundant there. But whatever.