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

Calculating dependencies ... done!
Dependency resolution took 0.98 s (backtrack: 0/20).

[ebuild  N     ] net-libs/libbtbb-2020.12.1-r2:0/2020.12.1::gentoo  USE="-static-libs" 302 KiB

Total: 1 package (1 new), Size of downloads: 302 KiB