▶ sbt
[info] Loading global plugins from /Users/bryan/.sbt/0.13/plugins
[info] Loading project definition from /Users/bryan/Development/NetLogo/nl.headless/project
java.lang.NullPointerException
        at java.io.File.<init>(File.java:277)
        at sbt.package$.file(package.scala:24)
        at $e335e48d65793b03a913$$anonfun$$sbtdef$1$$anonfun$1.apply(/Users/bryan/Development/NetLogo/nl.headless/project/plugins.sbt:7)
        at $e335e48d65793b03a913$$anonfun$$sbtdef$1$$anonfun$1.apply(/Users/bryan/Development/NetLogo/nl.headless/project/plugins.sbt:7)
        at scala.Option.getOrElse(Option.scala:120)
        at $e335e48d65793b03a913$$anonfun$$sbtdef$1.apply(/Users/bryan/Development/NetLogo/nl.headless/project/plugins.sbt:7)
        at $e335e48d65793b03a913$$anonfun$$sbtdef$1.apply(/Users/bryan/Development/NetLogo/nl.headless/project/plugins.sbt:4)
        at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
        at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:40)
        at sbt.std.Transform$$anon$4.work(System.scala:63)
        at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:226)
        at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:226)
        at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17)
        at sbt.Execute.work(Execute.scala:235)
        at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:226)
        at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:226)
        at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:159)
        at sbt.CompletionService$$anon$2.call(CompletionService.scala:28)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:744)
[error] (compile:unmanagedJars) java.lang.NullPointerException