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

Calculating dependencies ... done!
Dependency resolution took 0.97 s (backtrack: 0/20).

[ebuild  N     ] x11-misc/dmenu-5.4::gentoo  USE="-savedconfig -xinerama" 17 KiB

Total: 1 package (1 new), Size of downloads: 17 KiB