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-libs/libucl-0.9.2:0/9::gentoo  USE="regex utils -lua -sign -static-libs -test -urls" LUA_SINGLE_TARGET="lua5-1 -lua5-3" 1997 KiB

Total: 1 package (1 new), Size of downloads: 1997 KiB