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

Calculating dependencies ... done!
Dependency resolution took 1.10 s (backtrack: 0/20).

[ebuild  N     ] app-admin/sagan-rules-20210208::gentoo  451 KiB
[ebuild  N     ] acct-group/sagan-0-r2::gentoo  0 KiB
[ebuild  N     ] dev-libs/libestr-0.1.11-r1::gentoo  USE="-debug -static-libs -test" 348 KiB
[ebuild  N     ] dev-libs/libfastjson-1.2609.0:0/4.3.0::gentoo  USE="-static-libs" 132 KiB
[ebuild  N     ] net-libs/libesmtp-1.1.0-r2:0/8::gentoo  USE="ssl threads -static-libs" 166 KiB
[ebuild  N     ] acct-user/sagan-0-r3::gentoo  0 KiB
[ebuild  N     ] dev-libs/liblognorm-2.0.6-r1:0/5.1.0::gentoo  USE="-debug -doc -static-libs -test" 652 KiB
[ebuild  N     ] dev-libs/libpcre-8.45-r4:3::gentoo  USE="bzip2 cxx jit pcre16 readline (unicode) zlib -libedit -pcre32 -static-libs -valgrind" 1542 KiB
[ebuild  N     ] app-admin/sagan-2.0.2::gentoo  USE="libdnet pcap smtp -geoip -mysql -redis" 316 KiB

Total: 9 packages (9 new), Size of downloads: 3603 KiB