Clojurians Log v2

I'm getting a "Can't find variable: DevcardsSyntaxHighlighter" when running advanced optimization on my build. The build is named devcards, and the command I'm running is clj -m figwheel.main -O advanced -bo devcards -s

My devcards.cljs.edn build file is simply:

^{:auto-bundle :webpack}
{:main cards.core
 :devcards true}