I could be mistaken, but it seems as if Nova Launcher is only used to get to the setup for the Skip. If this is the case, you can also get into the Skip setup through the regular settings menu. Go into settings, and under "Personal", tap "Security". Tap "Screen Lock" and from the next menu, select "NFC Unlock". This takes you to the Skip Setup without having to have Nova Launcher. I don't personally have Skip or a DIY alternative, so I make no guarantees that this will work.
Would love it if this method works.