diff --git a/project/build/XSbt.scala b/project/build/XSbt.scala
index d7edff571..383996c01 100644
--- a/project/build/XSbt.scala
+++ b/project/build/XSbt.scala
@@ -300,7 +300,7 @@ class XSbt(info: ProjectInfo) extends ParentProject(info) with NoCrossPaths
 		
 		// sub projects for each version of Scala to precompile against other than the one sbt is built against
 		// each sub project here will add ~100k to the download
-		lazy val precompiled29 = precompiledSub("2.9.0-SNAPSHOT")
+		lazy val precompiled29 = precompiledSub("2.9.0.RC1")
 		lazy val precompiled28 = precompiledSub("2.8.0")
 		lazy val precompiled27 = precompiledSub("2.7.7")