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

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

[ebuild  N     ] net-libs/libnfnetlink-1.0.2::gentoo  USE="-verify-sig" 292 KiB
[ebuild  N     ] net-misc/miniupnpd-2.3.11::gentoo  USE="ipv6 leasefile -igd2 -nftables -pcp-peer -portinuse -strict -verify-sig" 301 KiB

Total: 2 packages (2 new), Size of downloads: 593 KiB