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

Calculating dependencies ... done!
Dependency resolution took 0.96 s (backtrack: 0/20).

[ebuild  N     ] dev-lang/fpc-3.2.2::gentoo  USE="-doc -source" 218178 KiB
[ebuild  N     ] sci-electronics/puff-20181104-r1::gentoo  421 KiB

Total: 2 packages (2 new), Size of downloads: 218598 KiB