The dbdir option is used to specify the location of the DHCPd database. The default /var/db is not FHS compliant so some may wish to change this to
--bindir=DIR user executables [PREFIX/bin]
--sbindir=DIR system admin executables [PREFIX/sbin]
--libexecdir=DIR program executables [PREFIX/libexec]
+ --dbdir=DIR database [STATEDIR/db/dhcpcd]
--sysconfdir=DIR read-only single-machine data [PREFIX/etc]
--localstatedir=DIR modifiable single-machine data [/var]
--libdir=DIR object code libraries [PREFIX/lib]