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

Calculating dependencies ... done!
Dependency resolution took 0.98 s (backtrack: 0/20).

[ebuild  N     ] app-admin/tmpwatch-2.11-r3::gentoo  USE="(-selinux)" 143 KiB

Total: 1 package (1 new), Size of downloads: 143 KiB