Unable to launch sbt in NetLogo repository

gistfile1.txt

Marins-MBP:NetLogo Marin$ sbt
[info] Loading global plugins from /Users/Marin/.sbt/0.13/plugins
[info] Loading project definition from /Users/Marin/Documents/NetLogo/project
[info] Updating {file:/Users/Marin/Documents/NetLogo/project/}netlogo-build...
[info] Resolving org.eclipse.jgit#org.eclipse.jgit.archive;3.7.0.201502260915-r [info] Resolving org.scala-sbt.ivy#ivy;2.3.0-sbt-fccfbd44c9f64523b61398a0155784d[info] Resolving org.fusesource.jansi#jansi;1.4 ...
[info] Done updating.
java.lang.NullPointerException
	at java.io.File.<init>(File.java:277)
	at sbt.package$.file(package.scala:24)
	at $1747e216ca710d968f9a$$anonfun$$sbtdef$1$$anonfun$apply$1.apply(/Users/Marin/Documents/NetLogo/project/build.sbt:6)
	at $1747e216ca710d968f9a$$anonfun$$sbtdef$1$$anonfun$apply$1.apply(/Users/Marin/Documents/NetLogo/project/build.sbt:6)
	at scala.Option.getOrElse(Option.scala:120)
	at $1747e216ca710d968f9a$$anonfun$$sbtdef$1.apply(/Users/Marin/Documents/NetLogo/project/build.sbt:6)
	at $1747e216ca710d968f9a$$anonfun$$sbtdef$1.apply(/Users/Marin/Documents/NetLogo/project/build.sbt:5)
	at sbt.Scoped$RichInitialize$$anonfun$map$1$$anonfun$apply$3.apply(Structure.scala:181)
	at sbt.std.Transform$$anon$3$$anonfun$apply$2.apply(System.scala:44)
	at sbt.std.Transform$$anon$3$$anonfun$apply$2.apply(System.scala:44)
	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:745)
[error] (compile:unmanagedJars) java.lang.NullPointerException
Project loading failed: (r)etry, (q)uit, (l)ast, or (i)gnore?