systemd-units:

This package contains the systemd units that are mentioned
in the BLFS BOOK notes when using systemd as the main init
system.

The various install targets are mentioned in the notes for
BLFS when using systemd as the default init system. There
are variables defined for script permissions {MODE},
configuration and units file permissions {CONFMODE},
directory permissions {DIRMODE} and destination directory
{DESTDIR}.