diff --git a/ivy/ComponentManager.scala b/ivy/ComponentManager.scala
index 16ff083da..32979ab3b 100644
--- a/ivy/ComponentManager.scala
+++ b/ivy/ComponentManager.scala
@@ -15,8 +15,9 @@ import java.util.concurrent.Callable
 * This is used for compiled source jars so that the compilation need not be repeated for other projects on the same
 * machine.
 */
-class ComponentManager(globalLock: xsbti.GlobalLock, provider: xsbti.ComponentProvider, val log: Logger) extends NotNull
+class ComponentManager(globalLock: xsbti.GlobalLock, provider: xsbti.ComponentProvider, ivyHome: Option[File], val log: Logger)
 {
+	private[this] val ivyCache = new IvyCache(ivyHome)
 	/** Get all of the files for component 'id', throwing an exception if no files exist for the component. */
 	def files(id: String)(ifMissing: IfMissing): Iterable[File] =
 	{
@@ -45,7 +46,7 @@ class ComponentManager(globalLock: xsbti.GlobalLock, provider: xsbti.ComponentPr
 	/** This is used to lock the local cache in project/boot/.  By checking the local cache first, we can avoid grabbing a global lock. */
 	private def lockLocalCache[T](action: => T): T = lock(provider.lockFile)( action )
 	/** This is used to ensure atomic access to components in the global Ivy cache.*/
-	private def lockGlobalCache[T](action: => T): T = lock(IvyCache.lockFile)( action )
+	private def lockGlobalCache[T](action: => T): T = lock(ivyCache.lockFile)( action )
 	private def lock[T](file: File)(action: => T): T = globalLock(file, new Callable[T] { def call = action })
 	/** Get the file for component 'id', throwing an exception if no files or multiple files exist for the component. */
 	def file(id: String)(ifMissing: IfMissing): File =
@@ -58,12 +59,12 @@ class ComponentManager(globalLock: xsbti.GlobalLock, provider: xsbti.ComponentPr
 
 	def define(id: String, files: Iterable[File]) = lockLocalCache { provider.defineComponent(id, files.toSeq.toArray) }
 	/** Retrieve the file for component 'id' from the local repository. */
-	private def update(id: String): Unit = IvyCache.withCachedJar(sbtModuleID(id), Some(globalLock), log)(jar => define(id, Seq(jar)) )
+	private def update(id: String): Unit = ivyCache.withCachedJar(sbtModuleID(id), Some(globalLock), log)(jar => define(id, Seq(jar)) )
 
 	private def sbtModuleID(id: String) = ModuleID("org.scala-tools.sbt", id, ComponentManager.stampedVersion)
 	/** Install the files for component 'id' to the local repository.  This is usually used after writing files to the directory returned by 'location'. */
-	def cache(id: String): Unit = IvyCache.cacheJar(sbtModuleID(id), file(id)(IfMissing.Fail), Some(globalLock), log)
-	def clearCache(id: String): Unit = lockGlobalCache { IvyCache.clearCachedJar(sbtModuleID(id), Some(globalLock), log) }
+	def cache(id: String): Unit = ivyCache.cacheJar(sbtModuleID(id), file(id)(IfMissing.Fail), Some(globalLock), log)
+	def clearCache(id: String): Unit = lockGlobalCache { ivyCache.clearCachedJar(sbtModuleID(id), Some(globalLock), log) }
 }
 class InvalidComponent(msg: String, cause: Throwable) extends RuntimeException(msg, cause)
 {
diff --git a/ivy/IvyCache.scala b/ivy/IvyCache.scala
index d7c524a84..ff4b57bac 100644
--- a/ivy/IvyCache.scala
+++ b/ivy/IvyCache.scala
@@ -28,9 +28,9 @@ private object NotInCache
 	}
 }
 /** Provides methods for working at the level of a single jar file with the default Ivy cache.*/
-object IvyCache
+class IvyCache(val ivyHome: Option[File])
 {
-	def lockFile = new File(System.getProperty("user.home"), ".sbt.cache.lock")
+	def lockFile = new File(ivyHome getOrElse Path.userHome, ".sbt.cache.lock")
 	/** Caches the given 'file' with the given ID.  It may be retrieved or cleared using this ID.*/
 	def cacheJar(moduleID: ModuleID, file: File, lock: Option[xsbti.GlobalLock], log: Logger)
 	{
@@ -85,7 +85,7 @@ object IvyCache
 	private def basicLocalIvy(lock: Option[xsbti.GlobalLock], log: Logger) =
 	{
 		val local = Resolver.defaultLocal
-		val paths = new IvyPaths(new File("."), None)
+		val paths = new IvyPaths(new File("."), ivyHome)
 		val conf = new InlineIvyConfiguration(paths, Seq(local), Nil, Nil, false, lock, IvySbt.DefaultChecksums, log)
 		(new IvySbt(conf), local)
 	}
diff --git a/ivy/src/test/scala/ComponentManagerTest.scala b/ivy/src/test/scala/ComponentManagerTest.scala
index 923304fde..1d9e77c44 100644
--- a/ivy/src/test/scala/ComponentManagerTest.scala
+++ b/ivy/src/test/scala/ComponentManagerTest.scala
@@ -77,5 +77,5 @@ object ComponentManagerTest extends Specification
 	private def writeRandomContent(file: File) = IO.write(file, randomString)
 	private def randomString = "asdf"
 	private def withManager[T](f: ComponentManager => T): T =
-		TestLogger( logger => withTemporaryDirectory { temp =>  f(new ComponentManager(xsbt.boot.Locks, new xsbt.boot.ComponentProvider(temp, true), logger)) } )
+		TestLogger( logger => withTemporaryDirectory { temp =>  f(new ComponentManager(xsbt.boot.Locks, new xsbt.boot.ComponentProvider(temp, true), None, logger)) } )
 }
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