Where does Analytics for Nagios get sourcetype="nagios:hosts" data from?

I have Analytics for Nagios (4.0.0), Splunk Add-on for Nagios Core (1.0.0), and Nagios (4.0.8) with mk_livestatus installed on some UNIX systems. Many of the Analytics for Nagios dashboards work fine but none of the dashboards using the nagios_hosts_sourcetype macro show any hosts. This seems to be because none of the data received by the indexer has sourcetype="nagios:hosts" or sourcetype="nagios:core" for that matter. The only data the indexer sees has sourcetypes: nagiosserviceperf, nagioshostperf, and nagios. What am I missing? Thanks.