Clojure (Joodo) deployment on Heroku failing - heroku

Question

I'm having some trouble getting my Joodo application to deploy to Heroku. According to the deployment instructions here http://joodoweb.com/, we can theoretically deploy without specifying a Procfile. This causes Heroku to run lein with-profile production trampoline run as the default command to launch the project. This leads to this error:
2014-04-26T19:30:46.899454+00:00 app[web.1]: Error encountered performing task 'trampoline' with profile(s): 'production'
2014-04-26T19:30:46.899525+00:00 app[web.1]: Suppressed exit
2014-04-26T19:30:46.899112+00:00 app[web.1]: No :main namespace specified in project.clj.
2014-04-26T19:30:48.275513+00:00 heroku[web.1]: Process exited with status 1
2014-04-26T19:30:49.093441+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path=/ host=floating-chamber-7585.herokuapp.com request_id=de532a37-57b1-4ce2-b5c0-c056019eda6b fwd="76.171.76.49" dyno= connect= service= status=503 bytes=
2014-04-26T19:30:48.303715+00:00 heroku[web.1]: State changed from starting to crashed
I have also tried explicitly setting the Procfile to 'lein ring server' (which is what you run in development). The error then is:
2014-04-26T21:24:34.229386+00:00 app[web.1]: java.lang.Exception: No namespace: heepster.view-helpers found
2014-04-26T21:24:34.221227+00:00 app[web.1]: :request-method :get
2014-04-26T21:24:34.221229+00:00 app[web.1]: :scheme :http
2014-04-26T21:24:34.221232+00:00 app[web.1]: :server-port 80
2014-04-26T21:24:34.221235+00:00 app[web.1]: :session/key nil
2014-04-26T21:24:34.229391+00:00 app[web.1]: at joodo.views$eval_content.invoke(views.clj:48)
2014-04-26T21:24:34.221238+00:00 app[web.1]: :uri /}
2014-04-26T21:24:34.229380+00:00 app[web.1]:
2014-04-26 21:24:34.227:WARN:oejs.AbstractHttpConnection:/
2014-04-26T21:24:34.229395+00:00 app[web.1]: at joodo.views$render_in_layout.invoke(views.clj:59)
2014-04-26T21:24:34.229388+00:00 app[web.1]: at clojure.core$the_ns.invoke(core.clj:3760)
2014-04-26T21:24:34.229401+00:00 app[web.1]: at heepster.main$fn__2523.invoke(main.clj:23)
2014-04-26T21:24:34.229405+00:00 app[web.1]: at compojure.core$if_route$fn__649.invoke(core.clj:40)
2014-04-26T21:24:34.229393+00:00 app[web.1]: at joodo.views$render.invoke(views.clj:52)
2014-04-26T21:24:34.229409+00:00 app[web.1]: at compojure.core$routing$fn__667.invoke(core.clj:107)
2014-04-26T21:24:34.229413+00:00 app[web.1]: at compojure.core$routing.doInvoke(core.clj:107)
2014-04-26T21:24:34.229397+00:00 app[web.1]: at joodo.views$render_template.doInvoke(views.clj:86)
2014-04-26T21:24:34.229403+00:00 app[web.1]: at compojure.core$make_route$fn__661.invoke(core.clj:94)
Does anyone have any ideas?