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

Calculating dependencies ... done!
Dependency resolution took 0.99 s (backtrack: 0/20).

[ebuild   R    ] sys-auth/nss-mdns-0.15.1::gentoo  USE="-test" 367 KiB

Total: 1 package (1 reinstall), Size of downloads: 367 KiB