How can I ignore sub folders or markdown files?

[Sindhu S]

My lein project has a command called start-clerk which corresponds to:

(defn -main
  "Serve clerk on the given port"
  [port]
  (clerk/serve! {:watch-paths ["src/device_backend" "test"]
                 :port (Integer/parseInt port)
                 :show-filter-fn #(cs/ends-with? % ".clj")}))

when i run lein start-clerk 3755 I see this:

How can I ignore ui folders under src?