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

Calculating dependencies ... done!
Dependency resolution took 1.67 s (backtrack: 0/20).

[ebuild     U  ] sys-libs/glibc-2.44-r4:2.2::gentoo [2.43:2.2::gentoo] USE="cet multiarch nscd* ssp (static-libs) -audit -caps (-clang) -compile-locales (-custom-cflags) -doc -gd -hash-sysv-compat -headers-only (-multilib) -multilib-bootstrap -old-kernel% -perl -profile (-selinux) -sframe (-stack-realign) -suid (-systemd) -systemtap -test (-vanilla) -verify-sig" 20226 KiB
[ebuild  N     ] sys-apps/unscd-0.54-r1::gentoo  72 KiB

Total: 2 packages (1 upgrade, 1 new), Size of downloads: 20297 KiB

The following USE changes are necessary to proceed:
 (see "package.use" in the portage(5) man page for more details)
# required by sys-apps/unscd-0.54-r1::gentoo
# required by =sys-apps/unscd-0.54-r1 (argument)
>=sys-libs/glibc-2.44-r4 nscd