Are Cyanogenmod nightlies compatible with latest vendor images? I am about to install Cyanogenmod 13 nightlies on my Nexus5x and was wondering how I can find out which vendor.img is required for which nightly?

thanks!
You generally need the latest vendor image but since we (CM), unlike Google, support all CM13 devices using the same code branch the build number you see in Settings -> About doesn't always match up with the build number you see for the stock images.

Solution: Run 'getprop | grep fingerprint' on a terminal on the device or via adb shell. From the output, compare "ro.build.fingerprint" and "ro.vendor.build.fingerprint" values. Those must match for the message to disappear.﻿