Weird.. that shouldn't happen. What version of the plugin do you have installed?

I specifically do

try:
    import ZeekControl.plugin as PluginBase
    from ZeekControl import cmdresult
    BINARY = "zeek"
except ImportError:
    import BroControl.plugin as PluginBase
    from BroControl import cmdresult
    BINARY = "bro"

so it should try the new name first to avoid that warning

from bro-doctor.

zkg list

zeek/j-gras/add-node-names (installed: master) - Adds cluster node name to logs.
zeek/j-gras/bro-af_packet-plugin (installed: 1.4.0) - This plugin provides native AF_Packet support for Bro.
zeek/ncsa/bro-doctor (installed: 2.0.1) - A broctl plugin that helps you troubleshoot common problems For cluster-related checks, the package "add-node-names" is recommended.

from bro-doctor.

Oh sigh. It's probably one of the OTHER plugins that's causing that.

from bro-doctor.