deviceLabels feature doesn't work in ocprometheus

[aned]

I'm trying: ./ocprometheus -addr 10.1.1.1:6042 -username blah -password blah -config sampleconf.yml

Config file: deviceLabels: 10.1.1.1: device_name: xyz

subscriptions:

• /Sysdb/connectivityMonitor/status/

metrics:

• name: PacketLossAristaXBRs path: /Sysdb/connectivityMonitor/status/hostStatus/(?P.+)/packetLoss help: Packet loss on Arista XBRs

The label device_name never gets added. Tried the same with FQDN - the same issue.