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

Calculating dependencies ... done!
Dependency resolution took 1.09 s (backtrack: 0/20).

[ebuild  N     ] acct-group/postgres-0-r3::gentoo  0 KiB
[ebuild  N     ] app-eselect/eselect-postgresql-2.4-r1::gentoo  5 KiB
[ebuild  N     ] app-arch/lz4-1.10.0-r1:0/1.10.0-meson::gentoo  USE="-static-libs -test" 379 KiB
[ebuild  N     ] acct-user/postgres-0-r3::gentoo  0 KiB
[ebuild  N     ] dev-db/postgresql-16.15:16::gentoo  USE="icu lz4 nls pam python readline server ssl zlib zstd -debug -doc -kerberos -ldap -llvm -perl (-selinux) -static-libs (-systemd) -tcl -uuid -xml" LLVM_SLOT="22 -17 -18 -19 -20 -21 -23" PYTHON_SINGLE_TARGET="python3_14 -python3_12 -python3_13" 24592 KiB

Total: 5 packages (5 new), Size of downloads: 24974 KiB