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

Calculating dependencies ... done!
Dependency resolution took 1.00 s (backtrack: 0/20).

[ebuild  N     ] app-forensics/chkrootkit-0.58b::gentoo  USE="cron (-selinux)" 47 KiB

Total: 1 package (1 new), Size of downloads: 47 KiB