These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.50 s (backtrack: 0/20).

[ebuild     UD ] net-misc/dhcpcd-10.2.4::gentoo [10.3.0::gentoo] USE="embedded ipv6 udev -debug -privsep" 270 KiB

Total: 1 package (1 downgrade), Size of downloads: 270 KiB