Error on Install

[thejimbirch]

First step: composer install

Installing Hatter style-guide assets ...
Script MidCamp\Hatter::installAssets handling the post-install-cmd event terminated with an exception


  [ErrorException]
  Undefined index: styleguide

[aCyborg]

I'm getting this now as well. As far as I can tell it doesn't actually break anything, but it is still odd.