I can't for the life of me figure out how to start gpsd on my Nexus 9. I see that I can start Kismet with gpsd support from the Nethunter app and it does so successfully. But attempting to use the same command (/usr/bin/gpsd -n tcp:// at the Nethunter root prompt fails. It's obviously failing to connect to, and something is supposed to be running there, but what? I found very old (circa 2014) reports of something called BlueNMEA, but no such thing seems to exist either as an app on my device or in the Kali chroot. What am I missing here?