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

Calculating dependencies ... done!
Dependency resolution took 0.98 s (backtrack: 0/20).

[ebuild  N     ] app-backup/backup-manager-0.7.14-r1::gentoo  USE="(-s3)" 142 KiB

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