diff --git a/sbt/src/main/scala/sbt/Project.scala b/sbt/src/main/scala/sbt/Project.scala
index 685ebf847..cb965d55a 100644
--- a/sbt/src/main/scala/sbt/Project.scala
+++ b/sbt/src/main/scala/sbt/Project.scala
@@ -234,9 +234,9 @@ trait Project extends TaskManager with Dag[Project] with BasicEnvironment
 
 	def componentManager = new ComponentManager(info.launcher.globalLock, info.app.components, log)
 	def buildScalaInstance = buildScalaInstance0
-	def buildLibraryJar = Path.fromFile(buildScalaInstance.libraryJar)
-	def buildCompilerJar = Path.fromFile(buildScalaInstance.compilerJar)
-	def buildScalaJars = Path.finder { buildScalaInstance.jars }
+	final def buildLibraryJar = Path.fromFile(buildScalaInstance.libraryJar)
+	final def buildCompilerJar = Path.fromFile(buildScalaInstance.compilerJar)
+	final def buildScalaJars = Path.finder { buildScalaInstance.jars }
 	final def buildScalaInstance0: ScalaInstance =
 	{
 		val scalaVersion = buildScalaVersion