http-server error

core.clj

(ns http-server.core
  (:require clojure.contrib.server-socket)
  (:gen-class))

(defn -main
  "I don't do a whole lot ... yet."
  [& args]
  (println "Hello, World!"))

dump

java.io.FileNotFoundException: Could not locate clojure/contrib/server_socket__init.class or clojure/contrib/server_socket.clj on classpath: 
              RT.java:443 clojure.lang.RT.load
              RT.java:411 clojure.lang.RT.load
            core.clj:5530 clojure.core/load[fn]
            core.clj:5529 clojure.core/load
          RestFn.java:408 clojure.lang.RestFn.invoke
            core.clj:5336 clojure.core/load-one
            core.clj:5375 clojure.core/load-lib[fn]
            core.clj:5374 clojure.core/load-lib
          RestFn.java:142 clojure.lang.RestFn.applyTo
             core.clj:619 clojure.core/apply
            core.clj:5413 clojure.core/load-libs
          RestFn.java:137 clojure.lang.RestFn.applyTo
             core.clj:619 clojure.core/apply
            core.clj:5496 clojure.core/require
          RestFn.java:408 clojure.lang.RestFn.invoke
/Users/jhn/code/gh/cs3157/lab8/http-server/src/http_server/core.clj:1 http-server.core/eval5111[fn]
/Users/jhn/code/gh/cs3157/lab8/http-server/src/http_server/core.clj:1 http-server.core/eval5111

project.clj

(defproject http-server "0.1.0-SNAPSHOT"
  :description "FIXME: write description"
  :url "http://example.com/FIXME"
  :license {:name "Eclipse Public License"
            :url "http://www.eclipse.org/legal/epl-v10.html"}
  :dependencies [[org.clojure/clojure "1.5.1"]]
  :main ^:skip-aot http-server.core
  :target-path "target/%s"
  :profiles {:uberjar {:aot :all}})