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

Calculating dependencies ... done!
Dependency resolution took 1.00 s (backtrack: 0/20).

[ebuild  N     ] app-misc/sphinx-2.2.11-r5::gentoo  USE="id64 -debug -mariadb -mysql -odbc -postgres -stemmer -syslog -xml" 2991 KiB

Total: 1 package (1 new), Size of downloads: 2991 KiB