Clojurians Log v2

Is there anyway to run a server with ring handlers, with some Undertow handlers that fire before? I'm trying to add open-zipkin tracing to the base libraries I use to spin up web servers.

I've tried passing a map to the immutant.web/run fn with an Undertow builder with host, port, and listeners set. The server runs on the correct host and port, but the listeners I add seems to get overwritten

listeners=handlers, i should say