that is enforced on <filename>systemd-udevd.service</filename>.</para>
<para>Please also note that <literal>:=</literal> and <literal>=</literal> are clearing
both, program and builtin commands.</para>
+ <para>In order to activate long-running processes from udev rules, provide a service unit, and
+ pull it in from a udev device using the <varname>SYSTEMD_WANTS</varname> device property. See
+ <citerefentry><refentrytitle>systemd.device</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ for details.</para>
</listitem>
</varlistentry>