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

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

[ebuild  N     ] dev-lang/yasm-1.3.0-r2::gentoo  USE="nls" 1458 KiB
[ebuild  N     ] media-libs/kvazaar-2.3.2:0/6::gentoo  USE="-static-libs -test" 587 KiB

Total: 2 packages (2 new), Size of downloads: 2044 KiB