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

Calculating dependencies ... done!
Dependency resolution took 0.97 s (backtrack: 0/20).

[ebuild  N     ] dev-perl/Device-SerialPort-1.40.0-r4::gentoo  USE="-examples -test" PERL_FEATURES="ithreads (-debug) -quadmath" 97 KiB
[ebuild  N     ] sci-geosciences/mtkbabel-0.8.3.1-r2::gentoo  28 KiB

Total: 2 packages (2 new), Size of downloads: 125 KiB