ClassNotFoundException

Exception in thread "main" java.lang.ClassNotFoundException: clojure.data.priority-map, compiling:(clj_sandbox/core.clj:6:12)
        at clojure.lang.Compiler.analyze(Compiler.java:6464)
        at clojure.lang.Compiler.analyze(Compiler.java:6406)
        at clojure.lang.Compiler$InvokeExpr.parse(Compiler.java:3665)
        at clojure.lang.Compiler.analyzeSeq(Compiler.java:6646)
        at clojure.lang.Compiler.analyze(Compiler.java:6445)
        at clojure.lang.Compiler.analyze(Compiler.java:6406)
        at clojure.lang.Compiler$InvokeExpr.parse(Compiler.java:3719)
        at clojure.lang.Compiler.analyzeSeq(Compiler.java:6646)
        at clojure.lang.Compiler.analyze(Compiler.java:6445)
        at clojure.lang.Compiler.analyze(Compiler.java:6406)
        at clojure.lang.Compiler$BodyExpr$Parser.parse(Compiler.java:5782)
        at clojure.lang.Compiler$FnMethod.parse(Compiler.java:5217)
        at clojure.lang.Compiler$FnExpr.parse(Compiler.java:3846)
        at clojure.lang.Compiler.analyzeSeq(Compiler.java:6642)
        at clojure.lang.Compiler.analyze(Compiler.java:6445)
        at clojure.lang.Compiler.analyzeSeq(Compiler.java:6632)
        at clojure.lang.Compiler.analyze(Compiler.java:6445)
        at clojure.lang.Compiler.access$100(Compiler.java:38)
        at clojure.lang.Compiler$DefExpr$Parser.parse(Compiler.java:538)
        at clojure.lang.Compiler.analyzeSeq(Compiler.java:6644)
        at clojure.lang.Compiler.analyze(Compiler.java:6445)
        at clojure.lang.Compiler.analyze(Compiler.java:6406)
        at clojure.lang.Compiler.eval(Compiler.java:6707)
        at clojure.lang.Compiler.load(Compiler.java:7130)
        at clojure.lang.RT.loadResourceScript(RT.java:370)
        at clojure.lang.RT.loadResourceScript(RT.java:361)
        at clojure.lang.RT.load(RT.java:440)
        at clojure.lang.RT.load(RT.java:411)
        at clojure.core$load$fn__5066.invoke(core.clj:5641)
        at clojure.core$load.doInvoke(core.clj:5640)
        at clojure.lang.RestFn.invoke(RestFn.java:408)
        at clojure.core$load_one.invoke(core.clj:5446)
        at clojure.core$load_lib$fn__5015.invoke(core.clj:5486)
        at clojure.core$load_lib.doInvoke(core.clj:5485)
        at clojure.lang.RestFn.applyTo(RestFn.java:142)
        at clojure.core$apply.invoke(core.clj:626)
        at clojure.core$load_libs.doInvoke(core.clj:5524)
        at clojure.lang.RestFn.applyTo(RestFn.java:137)
        at clojure.core$apply.invoke(core.clj:626)
        at clojure.core$require.doInvoke(core.clj:5607)
        at clojure.lang.RestFn.invoke(RestFn.java:408)
        at user$eval5$fn__7.invoke(form-init5476091993906476215.clj:1)
        at user$eval5.invoke(form-init5476091993906476215.clj:1)
        at clojure.lang.Compiler.eval(Compiler.java:6703)
        at clojure.lang.Compiler.eval(Compiler.java:6693)
        at clojure.lang.Compiler.load(Compiler.java:7130)
        at clojure.lang.Compiler.loadFile(Compiler.java:7086)
        at clojure.main$load_script.invoke(main.clj:274)
        at clojure.main$init_opt.invoke(main.clj:279)
        at clojure.main$initialize.invoke(main.clj:307)
        at clojure.main$null_opt.invoke(main.clj:342)
        at clojure.main$main.doInvoke(main.clj:420)
        at clojure.lang.RestFn.invoke(RestFn.java:421)
        at clojure.lang.Var.invoke(Var.java:383)
        at clojure.lang.AFn.applyToHelper(AFn.java:156)
        at clojure.lang.Var.applyTo(Var.java:700)
        at clojure.main.main(main.java:37)
Caused by: java.lang.ClassNotFoundException: clojure.data.priority-map
        at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
        at clojure.lang.DynamicClassLoader.findClass(DynamicClassLoader.java:61)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:348)
        at clojure.lang.RT.classForName(RT.java:2065)
        at clojure.lang.Compiler.resolveIn(Compiler.java:6921)
        at clojure.lang.Compiler.resolve(Compiler.java:6884)
        at clojure.lang.Compiler.analyzeSymbol(Compiler.java:6845)
        at clojure.lang.Compiler.analyze(Compiler.java:6427)
        ... 56 more

core.clj

(ns clj-sandbox.core
  (:require clojure.data.priority-map)
  (:gen-class))

(defn -main [& args]
  (println (clojure.data.priority-map :a 1 :b 2)))

info

(new project with lein add clj_sandbox)

% lein version
Leiningen 2.5.1 on Java 1.8.0_40 Java HotSpot(TM) 64-Bit Server VM

project.clj

(defproject clj_sandbox "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 "1.6.0"]
                 [org.clojure/data.priority-map "0.0.7"]]
  :main ^:skip-aot clj-sandbox.core
  :target-path "target/%s"
  :profiles {:uberjar {:aot :all}})