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

Calculating dependencies ... done!
Dependency resolution took 1.53 s (backtrack: 0/20).

[ebuild     UD ] net-analyzer/mtr-0.95-r1::gentoo [0.96-r1::gentoo] USE="filecaps ipinfo ipv6 ncurses -gtk% -jansson (-gui%)" 142 KiB

Total: 1 package (1 downgrade), Size of downloads: 142 KiB