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

Calculating dependencies ... done!
Dependency resolution took 1.02 s (backtrack: 0/20).

[ebuild  N     ] net-analyzer/nagios-plugins-2.4.12-r4::gentoo  USE="ipv6 nls ssh ssl -ldap -mysql -nagios-dns -nagios-game -nagios-ping -postgres -rpc -samba (-selinux) -snmp" 2689 KiB

Total: 1 package (1 new), Size of downloads: 2689 KiB