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/lzo-2.10:2::gentoo  USE="(split-usr) -examples -static-libs" 587 KiB
[ebuild  N     ] net-vpn/tinc-1.0.37::gentoo  USE="lzo zlib -uml -vde -verify-sig" 503 KiB

Total: 2 packages (2 new), Size of downloads: 1090 KiB