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

Calculating dependencies ... done!
Dependency resolution took 0.96 s (backtrack: 0/20).

[ebuild  N     ] sys-boot/gnu-efi-4.0.4::gentoo  USE="(-custom-cflags)" 240 KiB

Total: 1 package (1 new), Size of downloads: 240 KiB