Clojure build failure

gistfile1.txt

compile-clojure:
     [java] Compiling clojure.core to /Users/michael.blume/workspace/clojure/target/classes
     [java] Exception in thread "main" java.lang.LinkageError: loader constraint violation: loader (instance of clojure/lang/DynamicClassLoader) previously initiated loading for a different type with name "clojure/core/VecNode", compiling:(clojure/gvec.clj:124:1)
     [java] 	at clojure.lang.Compiler.analyzeSeq(Compiler.java:6715)
     [java] 	at clojure.lang.Compiler.analyze(Compiler.java:6499)
     [java] 	at clojure.lang.Compiler.analyze(Compiler.java:6460)
     [java] 	at clojure.lang.Compiler$BodyExpr$Parser.parse(Compiler.java:5840)
     [java] 	at clojure.lang.Compiler$FnMethod.parse(Compiler.java:5271)
     [java] 	at clojure.lang.Compiler$FnExpr.parse(Compiler.java:3900)
     [java] 	at clojure.lang.Compiler.analyzeSeq(Compiler.java:6706)
     [java] 	at clojure.lang.Compiler.analyze(Compiler.java:6499)
     [java] 	at clojure.lang.Compiler.analyzeSeq(Compiler.java:6696)
     [java] 	at clojure.lang.Compiler.analyze(Compiler.java:6499)
     [java] 	at clojure.lang.Compiler.access$200(Compiler.java:38)
     [java] 	at clojure.lang.Compiler$DefExpr$Parser.parse(Compiler.java:561)
     [java] 	at clojure.lang.Compiler.analyzeSeq(Compiler.java:6708)
     [java] 	at clojure.lang.Compiler.analyze(Compiler.java:6499)
     [java] 	at clojure.lang.Compiler.analyzeSeq(Compiler.java:6696)
     [java] 	at clojure.lang.Compiler.analyze(Compiler.java:6499)
     [java] 	at clojure.lang.Compiler.analyze(Compiler.java:6460)
     [java] 	at clojure.lang.Compiler$BodyExpr$Parser.parse(Compiler.java:5838)
     [java] 	at clojure.lang.Compiler$LetExpr$Parser.parse(Compiler.java:6154)
     [java] 	at clojure.lang.Compiler.analyzeSeq(Compiler.java:6708)
     [java] 	at clojure.lang.Compiler.analyze(Compiler.java:6499)
     [java] 	at clojure.lang.Compiler.analyze(Compiler.java:6460)
     [java] 	at clojure.lang.Compiler$BodyExpr$Parser.parse(Compiler.java:5840)
     [java] 	at clojure.lang.Compiler$FnMethod.parse(Compiler.java:5271)
     [java] 	at clojure.lang.Compiler$FnExpr.parse(Compiler.java:3900)
     [java] 	at clojure.lang.Compiler.analyzeSeq(Compiler.java:6706)
     [java] 	at clojure.lang.Compiler.analyze(Compiler.java:6499)
     [java] 	at clojure.lang.Compiler.analyze(Compiler.java:6460)
     [java] 	at clojure.lang.Compiler$InvokeExpr.parse(Compiler.java:3712)
     [java] 	at clojure.lang.Compiler.analyzeSeq(Compiler.java:6710)
     [java] 	at clojure.lang.Compiler.analyze(Compiler.java:6499)
     [java] 	at clojure.lang.Compiler.analyze(Compiler.java:6460)
     [java] 	at clojure.lang.Compiler$LetExpr$Parser.parse(Compiler.java:6066)
     [java] 	at clojure.lang.Compiler.analyzeSeq(Compiler.java:6708)
     [java] 	at clojure.lang.Compiler.analyze(Compiler.java:6499)
     [java] 	at clojure.lang.Compiler.analyze(Compiler.java:6460)
     [java] 	at clojure.lang.Compiler.compile1(Compiler.java:7285)
     [java] 	at clojure.lang.Compiler.compile(Compiler.java:7356)
     [java] 	at clojure.lang.RT.compile(RT.java:398)
     [java] 	at clojure.lang.RT.load(RT.java:438)
     [java] 	at clojure.lang.RT.load(RT.java:411)
     [java] 	at clojure.core$load$fn__5401.invoke(core.clj:5808)
     [java] 	at clojure.core$load.doInvoke(core.clj:5807)
     [java] 	at clojure.lang.RestFn.applyTo(RestFn.java:137)
     [java] 	at clojure.lang.Compiler$InvokeExpr.eval(Compiler.java:3600)
     [java] 	at clojure.lang.Compiler.compile1(Compiler.java:7290)
     [java] 	at clojure.lang.Compiler.compile(Compiler.java:7356)
     [java] 	at clojure.lang.RT.compile(RT.java:398)
     [java] 	at clojure.lang.RT.load(RT.java:438)
     [java] 	at clojure.lang.RT.load(RT.java:411)
     [java] 	at clojure.core$load$fn__1613.invoke(core.clj:5808)
     [java] 	at clojure.core$load.doInvoke(core.clj:5807)
     [java] 	at clojure.lang.RestFn.invoke(RestFn.java:408)
     [java] 	at clojure.core$load_one.invoke(core.clj:5613)
     [java] 	at clojure.core$compile$fn__1618.invoke(core.clj:5819)
     [java] 	at clojure.core$compile.invoke(core.clj:5818)
     [java] 	at clojure.lang.Var.invoke(Var.java:379)
     [java] 	at clojure.lang.Compile.main(Compile.java:67)
     [java] Caused by: java.lang.LinkageError: loader constraint violation: loader (instance of clojure/lang/DynamicClassLoader) previously initiated loading for a different type with name "clojure/core/VecNode"
     [java] 	at java.lang.Class.getDeclaredConstructors0(Native Method)
     [java] 	at java.lang.Class.privateGetDeclaredConstructors(Class.java:2663)
     [java] 	at java.lang.Class.getConstructors(Class.java:1643)
     [java] 	at clojure.lang.Compiler$NewExpr.<init>(Compiler.java:2491)
     [java] 	at clojure.lang.Compiler$NewExpr$Parser.parse(Compiler.java:2593)
     [java] 	at clojure.lang.Compiler.analyzeSeq(Compiler.java:6708)
     [java] 	... 57 more