diff --git a/main-command/src/main/scala/sbt/FileTreeViewConfig.scala b/main-command/src/main/scala/sbt/FileTreeViewConfig.scala
index 4b1179bfe..c1dd8fa6d 100644
--- a/main-command/src/main/scala/sbt/FileTreeViewConfig.scala
+++ b/main-command/src/main/scala/sbt/FileTreeViewConfig.scala
@@ -7,7 +7,7 @@
 
 package sbt
 import sbt.Watched.WatchSource
-import sbt.internal.io.{ WatchServiceBackedObservable, WatchState }
+import sbt.internal.io.{ HybridPollingFileTreeRepository, WatchServiceBackedObservable, WatchState }
 import sbt.io._
 import FileTreeDataView.{ Observable, Observer }
 import sbt.util.Logger
@@ -109,4 +109,64 @@ object FileTreeViewConfig {
         FileEventMonitor.antiEntropy(copied, antiEntropy, msg => logger.debug(msg.toString))
       }
     )
+
+  /**
+   * Provides a default [[FileTreeViewConfig]]. When the pollingSources argument is empty, it
+   * returns the same config as [[sbt.FileTreeViewConfig.default(antiEntropy:scala\.concurrent\.duration\.FiniteDuration)*]].
+   * Otherwise, it returns the same config as [[polling]].
+   * @param antiEntropy the duration of the period after a path triggers a build for which it is
+   *                    quarantined from triggering another build
+   * @param pollingInterval the frequency with which the sbt.io.FileEventMonitor polls the file
+   *                        system for the paths included in pollingSources
+   * @param pollingSources the sources that will not be cached in the sbt.io.FileTreeRepository and that
+   *                       will be periodically polled for changes during continuous builds.
+   * @return
+   */
+  def default(
+      antiEntropy: FiniteDuration,
+      pollingInterval: FiniteDuration,
+      pollingSources: Seq[WatchSource]
+  ): FileTreeViewConfig = {
+    if (pollingSources.isEmpty) default(antiEntropy)
+    else polling(antiEntropy, pollingInterval, pollingSources)
+  }
+
+  /**
+   * Provides a polling [[FileTreeViewConfig]]. Unlike the view returned by newDataView in
+   * [[sbt.FileTreeViewConfig.default(antiEntropy:scala\.concurrent\.duration\.FiniteDuration)*]],
+   * the view returned by newDataView will not cache any portion of the file system tree that is is
+   * covered by the pollingSources parameter. The monitor that is generated by newMonitor, will
+   * poll these directories for changes rather than relying on file system events from the
+   * operating system. Any paths that are registered with the view that are not included in the
+   * pollingSources will be cached and monitored using file system events from the operating system
+   * in the same way that they are in the default view.
+   *
+   * @param antiEntropy the duration of the period after a path triggers a build for which it is
+   *                    quarantined from triggering another build
+   * @param pollingInterval the frequency with which the FileEventMonitor polls the file system
+   *                        for the paths included in pollingSources
+   * @param pollingSources the sources that will not be cached in the sbt.io.FileTreeRepository and that
+   *                       will be periodically polled for changes during continuous builds.
+   * @return a [[FileTreeViewConfig]] instance.
+   */
+  def polling(
+      antiEntropy: FiniteDuration,
+      pollingInterval: FiniteDuration,
+      pollingSources: Seq[WatchSource],
+  ): FileTreeViewConfig = FileTreeViewConfig(
+    () => FileTreeRepository.hybrid(StampedFile.converter, pollingSources: _*),
+    (
+        repository: HybridPollingFileTreeRepository[StampedFile],
+        sources: Seq[WatchSource],
+        logger: Logger
+    ) => {
+      repository.register(sources)
+      FileEventMonitor
+        .antiEntropy(
+          repository.toPollingObservable(pollingInterval, sources, NullWatchLogger),
+          antiEntropy,
+          msg => logger.debug(msg.toString)
+        )
+    }
+  )
 }
diff --git a/main/src/main/scala/sbt/Defaults.scala b/main/src/main/scala/sbt/Defaults.scala
index 1aa5bb35f..212d02442 100755
--- a/main/src/main/scala/sbt/Defaults.scala
+++ b/main/src/main/scala/sbt/Defaults.scala
@@ -250,6 +250,7 @@ object Defaults extends BuildCommon {
       extraLoggers :== { _ =>
         Nil
       },
+      pollingDirectories :== Nil,
       watchSources :== Nil,
       watchProjectSources :== Nil,
       skip :== false,
@@ -271,7 +272,8 @@ object Defaults extends BuildCommon {
         None
       },
       watchStartMessage := Watched.defaultStartWatch,
-      fileTreeViewConfig := FileTreeViewConfig.default(watchAntiEntropy.value),
+      fileTreeViewConfig := FileTreeViewConfig
+        .default(watchAntiEntropy.value, pollInterval.value, pollingDirectories.value),
       fileTreeView := state.value
         .get(BasicKeys.globalFileTreeView)
         .getOrElse(FileTreeView.DEFAULT.asDataView(StampedFile.converter)),
@@ -655,7 +657,8 @@ object Defaults extends BuildCommon {
     },
     watchStartMessage := Watched.projectOnWatchMessage(thisProjectRef.value.project),
     watch := watchSetting.value,
-    fileTreeViewConfig := FileTreeViewConfig.default(watchAntiEntropy.value)
+    fileTreeViewConfig := FileTreeViewConfig
+      .default(watchAntiEntropy.value, pollInterval.value, pollingDirectories.value)
   )
 
   def generate(generators: SettingKey[Seq[Task[Seq[File]]]]): Initialize[Task[Seq[File]]] =
diff --git a/main/src/main/scala/sbt/Keys.scala b/main/src/main/scala/sbt/Keys.scala
index b0513181b..ebf6a8cd1 100644
--- a/main/src/main/scala/sbt/Keys.scala
+++ b/main/src/main/scala/sbt/Keys.scala
@@ -147,6 +147,7 @@ object Keys {
   val suppressSbtShellNotification = settingKey[Boolean]("""True to suppress the "Executing in batch mode.." message.""").withRank(CSetting)
   val fileTreeView = taskKey[FileTreeDataView[StampedFile]]("A view of the file system")
   val pollInterval = settingKey[FiniteDuration]("Interval between checks for modified sources by the continuous execution command.").withRank(BMinusSetting)
+  val pollingDirectories = settingKey[Seq[Watched.WatchSource]]("Directories that cannot be cached and must always be rescanned. Typically these will be NFS mounted or something similar.").withRank(DSetting)
   val watchAntiEntropy = settingKey[FiniteDuration]("Duration for which the watch EventMonitor will ignore events for a file after that file has triggered a build.").withRank(BMinusSetting)
   val watchConfig = taskKey[WatchConfig]("The configuration for continuous execution.").withRank(BMinusSetting)
   val watchLogger = taskKey[Logger]("A logger that reports watch events.").withRank(DSetting)