title: sbt cannot find the scripted-sbt dependency
body: <p>I'm using the <code>scripted</code> sbt plugin for one of my projects and it has been working fine, but stopped working sometime recently for no obvious reason. Here is a sample setup that fails:</p>
  
  <pre><code># project/plugins.sbt
  libraryDependencies += "org.scala-sbt" % "scripted-plugin" % sbtVersion.value
  
  # build.sbt
  scalaVersion := "2.11.6"
  
  scriptedSettings
  
  # project/build.properties
  sbt.version=0.13.5
  </code></pre>
  
  <p>When I do <code>sbt update</code> I see the following. Note that it downloads <code>scripted-plugin</code> but cannot find <code>scripted-sbt</code>. This worked fine until recently and just kind of stopped. Any ideas?</p>
  
  <pre><code>test$ sbt update
  Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=1024m; support was removed in 8.0
  [info] Loading project definition from /private/tmp/test/project
  [info] Updating {file:/private/tmp/test/project/}test-build...
  [info] Resolving org.fusesource.jansi#jansi;1.4 ...
  
  ...
  
  [info] downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/scripted-plugin/0.13.5/jars/scripted-plugin.jar ...
  [info]  [SUCCESSFUL ] org.scala-sbt#scripted-plugin;0.13.5!scripted-plugin.jar (4424ms)
  
  ...
  
  [info] Done updating.
  [info] Set current project to test (in build file:/private/tmp/test/)
  [info] Updating {file:/private/tmp/test/}test...
  [info] Resolving org.scala-sbt#scripted-sbt;0.13.5 ...
  [warn]  module not found: org.scala-sbt#scripted-sbt;0.13.5
  [warn] ==== local: tried
  [warn]   /Users/rnorris/.ivy2/local/org.scala-sbt/scripted-sbt/0.13.5/ivys/ivy.xml
  [warn] ==== public: tried
  [warn]   http://repo1.maven.org/maven2/org/scala-sbt/scripted-sbt/0.13.5/scripted-sbt-0.13.5.pom
  [info] Resolving org.scala-sbt#sbt-launch;0.13.5 ...
  [warn]  ::::::::::::::::::::::::::::::::::::::::::::::
  [warn]  ::          UNRESOLVED DEPENDENCIES         ::
  [warn]  ::::::::::::::::::::::::::::::::::::::::::::::
  [warn]  :: org.scala-sbt#scripted-sbt;0.13.5: not found
  [warn]  ::::::::::::::::::::::::::::::::::::::::::::::
  sbt.ResolveException: unresolved dependency: org.scala-sbt#scripted-sbt;0.13.5: not found
    at sbt.IvyActions$.sbt$IvyActions$$resolve(IvyActions.scala:217)
    at sbt.IvyActions$$anonfun$update$1.apply(IvyActions.scala:126)
  
  ...
  
  [error] (*:update) sbt.ResolveException: unresolved dependency: org.scala-sbt#scripted-sbt;0.13.5: not found
  [error] Total time: 2 s, completed Jun 12, 2015 2:13:32 PM
  </code></pre>