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

Calculating dependencies ... done!
Dependency resolution took 1.02 s (backtrack: 0/20).

[ebuild  N     ] sci-libs/gsl-2.7.1-r3:0/27::gentoo  USE="deprecated -cblas-external -static-libs" 7346 KiB
[ebuild  N     ] app-arch/cpio-2.15::gentoo  USE="nls" 1613 KiB
[ebuild  N     ] app-alternatives/cpio-0::gentoo  USE="gnu (split-usr) -libarchive" 0 KiB
[ebuild  N     ] app-arch/pax-20201030::gentoo  168 KiB
[ebuild  N     ] mail-filter/bogofilter-1.2.5-r1::gentoo  USE="sqlite -berkdb -tokyocabinet" 783 KiB

Total: 5 packages (5 new), Size of downloads: 9909 KiB