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-apps/watchdog-5.16-r1::gentoo  USE="-nfs (-selinux)" 200 KiB

Total: 1 package (1 new), Size of downloads: 200 KiB