unable to build with sbt on ubuntu

[kk00ss]

compilation terminated. make: *** [capnpc-java] Error 1 [trace] Stack trace suppressed: run last examples/:makeExamples for the full output. [trace] Stack trace suppressed: run last compiler/:makeCpp for the full output. error Nonzero exit value: 2 error Nonzero exit value: 2 [error] Total time: 1 s, completed Jun 29, 2015 7:35:02 PM capnproto-java$ last compiler/*:makeCpp java.lang.RuntimeException: Nonzero exit value: 2 at scala.sys.package$.error(package.scala:27) at scala.Predef$.error(Predef.scala:142) at sbt.AbstractProcessBuilder.getString(ProcessImpl.scala:146) at sbt.AbstractProcessBuilder.$bang$bang(ProcessImpl.scala:148) at Build$$anonfun$2.apply$mcV$sp(build.scala:74) at Build$$anonfun$2.apply(build.scala:73) at Build$$anonfun$2.apply(build.scala:73) at sbt.std.Transform$$anon$3$$anonfun$apply$2.apply(System.scala:45) at sbt.std.Transform$$anon$3$$anonfun$apply$2.apply(System.scala:45) at sbt.std.Transform$$anon$4.work(System.scala:64) at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:237) at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:237) at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:18) at sbt.Execute.work(Execute.scala:244) at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:237) at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:237) at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:160) at sbt.CompletionService$$anon$2.call(CompletionService.scala:30) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) error Nonzero exit value: 2