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

Calculating dependencies ... done!
Dependency resolution took 1.49 s (backtrack: 0/20).

[ebuild     U  ] net-misc/keychain-2.9.8::gentoo [2.8.5-r2::gentoo] 90 KiB

Total: 1 package (1 upgrade), Size of downloads: 90 KiB