Attempting to get this running again.
Run Munki Overnight (so laptops can update with lid closed) Package with your package maker of choice (munki-pkg https://github.com/munki/munki-pkg)
No warranties provided. Test in your environment.
Forked from https://github.com/jmartinez0837/Munki-Overnight
Moving over to pmset+caffeinate only. Eliminating Nosleep Extension. Thanks to ldooks on IRC.freenode.net##osx-server for the amazing help and advice! http://pastebin.com/W8ayMT7F for their original code.