Has anybody used firebase with matchbox in a expo app? I am able to get everything working in dev mode

but when i do a lein prod-build the compilation fails with the following error

Caused by: clojure.lang.ExceptionInfo: No such namespace: cljs.core.async, could not locate cljs/core/async.cljs, cljs/core/async.cljc, or JavaScript source providing "cljs.core.async" in file target/expo/matchbox/async.cljc {:tag :cljs/analysis-error} at clojure.core$ex_info.invokeStatic(core.clj:4725)

any ideas? what could be the issue

Added [cljsjs/firebase "2.4.1-0"] [org.clojure/core.async "0.2.374"]

and the compilation lein prod-build is successful

however i have to comment the above for lein figwheel