diff --git a/main/Build.scala b/main/Build.scala
index e28adee3b..3e188e291 100644
--- a/main/Build.scala
+++ b/main/Build.scala
@@ -29,7 +29,7 @@ trait Plugin
 object Build
 {
 	val default: Build = new Build { override def projectDefinitions(base: File) = defaultProject(base) :: Nil }
-	def defaultID(base: File): String = "default-" + Hash.halfHashString(base.getAbsolutePath)
+	def defaultID(base: File): String = "default-" + Hash.trimHashString(base.getAbsolutePath, 6)
 	def defaultProject(base: File): Project = Project(defaultID(base), base).settings(Keys.organization := "default")
 
 	def data[T](in: Seq[Attributed[T]]): Seq[T] = in.map(_.data)
diff --git a/util/io/Hash.scala b/util/io/Hash.scala
index fe6a47a75..6b44cea5e 100644
--- a/util/io/Hash.scala
+++ b/util/io/Hash.scala
@@ -33,6 +33,7 @@ object Hash
 		array
 	}
 	def halve(s: String): String = if(s.length > 3) s.substring(0, s.length / 2) else s
+	def trimHashString(s: String, i: Int): String = toHex(apply(s)).take(i)
 	def halfHashString(s: String): String = halve(toHex(apply(s)))
 
 	/** Calculates the SHA-1 hash of the given String.*/