diff --git a/main/src/main/scala/sbt/Defaults.scala b/main/src/main/scala/sbt/Defaults.scala
index c8062c48f..3205c1a3a 100755
--- a/main/src/main/scala/sbt/Defaults.scala
+++ b/main/src/main/scala/sbt/Defaults.scala
@@ -2041,7 +2041,12 @@ object Classpaths {
         excludeFilter in unmanagedJars value
       )
     ).map(exportClasspath) ++ Seq(
-      sbt.nio.Keys.dependencyClasspathFiles := data(dependencyClasspath.value).map(_.toPath),
+      dependencyClasspathFiles := data(dependencyClasspath.value).map(_.toPath),
+      dependencyClasspathFiles / outputFileStamps := {
+        val cache = managedFileStampCache.value
+        val stamper = outputFileStamper.value
+        dependencyClasspathFiles.value.flatMap(p => cache.getOrElseUpdate(p, stamper).map(p -> _))
+      }
     )
 
   private[this] def exportClasspath(s: Setting[Task[Classpath]]): Setting[Task[Classpath]] =