When I try to connect to figwheel-main via Piggieback with vim-fireplace, figwheel starts emitting some code (eg. cljs/repl.js) into "out" directory in my project root where the server can't find it, regardless of :output-dir setting of my build. Anyone know why it's happening?

In fact, when I run my build with {:mode :repl} it puts cljs/repl.js in the :output-dir, but with {:mode :serve} it appears in "out" after I try to connect. But even with {:mode :repl} some other JS appears in "out".