gentoo-overlay/sys-apps/systemd/files/nsswitch.conf

# Sample nss configuration for systemd

# systemd-specific modules
# See the manual pages fore further information.
# nss-myhostname - host resolution for the local hostname
# nss-mymachines - host, user, group resolution for containers
# nss-resolve - host resolution using resolved
# nss-systemd - dynamic user/group resolution (DynamicUser in unit files)

passwd:     files mymachines systemd
shadow:     files
group:      files mymachines systemd
gshadow:    files

hosts:      files mymachines resolve [!UNAVAIL=return] dns myhostname
networks:   files

services:   db files
protocols:  db files
rpc:        db files
ethers:     db files
netmasks:   files
netgroup:   files
bootparams: files

automount:  files
aliases:    files