Drush make to use Opigno as core

I have a drush make file that uses opigno_lms as core but adds a few extra modules that I need for a site. A much truncated version of the make file looks like this: core: "7.x" api: 2 projects: opigno_lms: type: "core" version: ~ google_analytics: version: ~ Drush builds this with no errors but there's stuff missing, like for instance the platon theme. What else should I be including to build all of Opigno?