Error compiling clojure against capacitor with conflicting core.async depency

error message

CompilerException java.lang.Exception: namespace 'clojure.core.async.impl.channels' not found, compiling:(clojure/core/async.clj:9:1) 

lein deps :tree

Possibly confusing dependencies found:
[com.taoensso/carmine "2.6.2"] -> [com.taoensso/encore "1.4.0"]
 overrides
[com.taoensso/timbre "3.2.1"] -> [com.taoensso/encore "1.5.1"]

Consider using these exclusions:
[com.taoensso/timbre "3.2.1" :exclusions [com.taoensso/encore]]

 [alembic "0.2.1"]
   [lein-as-resource "2.1.3"]
   [org.flatland/classlojure "0.7.0"]
   [org.tcrawley/dynapath "0.2.3"]
 [capacitor "0.2.2" :exclusions [[org.clojure/core.async]]]
   [http-kit "2.1.18"]
 [cheshire "5.3.1"]
   [com.fasterxml.jackson.core/jackson-core "2.3.1"]
   [com.fasterxml.jackson.dataformat/jackson-dataformat-smile "2.3.1"]
   [tigris "0.1.1"]
 [cider/cider-nrepl "0.6.0"]
   [cljs-tooling "0.1.2"]
   [compliment "0.0.3"]
   [org.clojure/java.classpath "0.2.0"]
 [clj-http "0.9.2"]
   [commons-io "2.4" :exclusions [[org.clojure/clojure]]]
   [crouton "0.1.2" :exclusions [[org.clojure/clojure]]]
     [org.jsoup/jsoup "1.7.1"]
   [org.apache.httpcomponents/httpclient "4.3.3" :exclusions [[org.clojure/clojure]]]
     [commons-logging "1.1.3"]
   [org.apache.httpcomponents/httpcore "4.3.2" :exclusions [[org.clojure/clojure]]]
   [org.apache.httpcomponents/httpmime "4.3.3" :exclusions [[org.clojure/clojure]]]
   [org.clojure/tools.reader "0.8.4" :exclusions [[org.clojure/clojure]]]
   [potemkin "0.3.4" :exclusions [[org.clojure/clojure]]]
     [clj-tuple "0.1.2"]
     [riddley "0.1.6"]
   [slingshot "0.10.3" :exclusions [[org.clojure/clojure]]]
 [clojure-complete "0.2.3" :exclusions [[org.clojure/clojure]]]
 [clojurewerkz/quartzite "1.2.0"]
   [clj-time "0.6.0"]
     [joda-time "2.2"]
   [org.quartz-scheduler/quartz "2.1.7"]
     [c3p0 "0.9.1.1"]
     [org.slf4j/slf4j-api "1.6.1"]
 [com.stuartsierra/component "0.2.1"]
   [com.stuartsierra/dependency "0.1.1"]
 [com.taoensso/carmine "2.6.2"]
   [com.taoensso/encore "1.4.0"]
   [com.taoensso/nippy "2.6.3"]
     [org.iq80.snappy/snappy "0.3"]
     [org.tukaani/xz "1.5"]
   [commons-codec "1.9"]
   [commons-pool "1.6"]
   [org.clojure/data.json "0.2.4"]
 [com.taoensso/timbre "3.2.1"]
   [io.aviso/pretty "0.1.10"]
 [org.clojure/clojure "1.6.0"]
 [org.clojure/core.async "0.1.303.0-886421-alpha"]
   [org.clojure/tools.analyzer.jvm "0.1.0-beta12"]
     [org.clojure/core.memoize "0.5.6"]
       [org.clojure/core.cache "0.6.3"]
         [org.clojure/data.priority-map "0.0.2"]
     [org.clojure/tools.analyzer "0.1.0-beta12"]
     [org.ow2.asm/asm-all "4.1"]
 [org.clojure/tools.cli "0.3.1"]
 [org.clojure/tools.namespace "0.2.4"]
 [org.clojure/tools.nrepl "0.2.3" :exclusions [[org.clojure/clojure]]]
 [slamhound "1.5.4"]

project.clj

(defproject oden "0.1.0-SNAPSHOT"
  :description "Skalera decision engine, god of gods"
  :url "https://github.com/skalera/oden"
  :main oden.core
  :profiles {:uberjar {:aot :all}}
  :dependencies [[org.clojure/clojure "1.6.0"]
                 [capacitor "0.2.2" :exclusions [org.clojure/core.async]]
                 [org.clojure/core.async "0.1.303.0-886421-alpha"]
                 [com.stuartsierra/component "0.2.1"]
                 [clojurewerkz/quartzite "1.2.0"]
                 [com.taoensso/carmine "2.6.2"]
                 [com.taoensso/timbre "3.2.1"]
                 [org.clojure/tools.nrepl "0.2.3"]
                 [cheshire "5.3.1"]
                 [org.clojure/tools.cli "0.3.1"]
                 [clj-http "0.9.2"]])