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

Calculating dependencies ... done!
Dependency resolution took 0.97 s (backtrack: 0/20).

[ebuild  N     ] acct-group/karma-0-r2::gentoo  0 KiB
[ebuild  N     ] acct-user/karma-0-r2::gentoo  0 KiB
[ebuild  N     ] www-apps/karma-bin-0.90::gentoo  12522 KiB

Total: 3 packages (3 new), Size of downloads: 12522 KiB