I tried to build LOS from scratch for the well-understood Nexus 5, following their wiki instructions, so that my CA certificate could be a privileged "system" cert instead of a worthless "user" cert.

Those instructions didn't actually work. Following the only remaining advice LOS has to offer, I went to their IRC channel to ask what was wrong. After waiting more than half a day, I eventually got a response: "no one really talks in here".

Needless to say, I did not get any help.