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/mujs-1.3.9:0/1.3.9::gentoo  2585 KiB

Total: 1 package (1 new), Size of downloads: 2585 KiB