What could be causing me to get a 'No such namespace' with a cljs dependency when I run lein uberjar, but not when I run lein cljsbuild?

Or for that matter, any compilation error discrepancy between lein cljsbuild and lein uberjar

not sure - how do you run cljsbuild? with dev profile? In that case, there's a difference at least in optimizations (`:advanced` vs :none)

more details and possibly a minimal reproducer could help