我们将一个较旧的系统升级到较新版本的play（scala 2.12.8->2.13.5，play 2.6->2.8），现在我有以下代码：

Ok.chunked(Source.fromPublisher(IterateeStreams.enumeratorToPublisher(MyEnumerator))).withHeaders(...)

在新项目中，iterateestreams似乎丢失了，但是当我尝试使用

libraryDependencies += ....
                       "com.typesafe.play" %% "play-iteratees" % "2.6.1"
                       "com.typesafe.play" %% "play-iteratees-reactive-streams" % "2.6.1"

下载失败。我也试过书中描述的 akka 河https://www.playframework.com/documentation/2.8.x/streamsmigration25
但是intellij也不知道“stream”类(导入akka.\在类中）。我试着玩弄依赖之类的东西，但似乎我做不到，现在我很困惑。
我对scala/play还很陌生（两周前开始），所以我可能会犯一些新手的错误。。。
错误：

$ compile
[info] Updating 
[info] Resolved  dependencies
[warn] 
[warn]  Note: Unresolved dependencies path:
[error] stack trace is suppressed; run last update for the full output
[error] (update) sbt.librarymanagement.ResolveException: Error downloading com.typesafe.play:play-iteratees-reactive-streams_2.13:2.6.1
[error]   Not found
[error]   Not found
[error]   not found: /home/******/.ivy2/local/com.typesafe.play/play-iteratees-reactive-streams_2.13/2.6.1/ivys/ivy.xml
[error]   not found: https://repo1.maven.org/maven2/com/typesafe/play/play-iteratees-reactive-streams_2.13/2.6.1/play-iteratees-reactive-streams_2.13-2.6.1.pom
[error]   not found: https://dl.bintray.com/scalaz/releases/com/typesafe/play/play-iteratees-reactive-streams_2.13/2.6.1/play-iteratees-reactive-streams_2.13-2.6.1.pom
[error]   not found: https://repo.akka.io/snapshots/com/typesafe/play/play-iteratees-reactive-streams_2.13/2.6.1/play-iteratees-reactive-streams_2.13-2.6.1.pom
[error] Total time: 4 s, completed 26.04.2021, 12:40:02
[myProject] $ last update
[debug] "not up to date. inChanged = true, force = false
[debug] Updating ...
[info] Updating 
[info] Resolved  dependencies
[warn] 
[warn]  Note: Unresolved dependencies path:
[error] sbt.librarymanagement.ResolveException: Error downloading com.typesafe.play:play-iteratees-reactive-streams_2.13:2.6.1
[error]   Not found
[error]   Not found
[error]   not found: /home/*******/.ivy2/local/com.typesafe.play/play-iteratees-reactive-streams_2.13/2.6.1/ivys/ivy.xml
[error]   not found: https://repo1.maven.org/maven2/com/typesafe/play/play-iteratees-reactive-streams_2.13/2.6.1/play-iteratees-reactive-streams_2.13-2.6.1.pom
[error]   not found: https://dl.bintray.com/scalaz/releases/com/typesafe/play/play-iteratees-reactive-streams_2.13/2.6.1/play-iteratees-reactive-streams_2.13-2.6.1.pom
[error]   not found: https://repo.akka.io/snapshots/com/typesafe/play/play-iteratees-reactive-streams_2.13/2.6.1/play-iteratees-reactive-streams_2.13-2.6.1.pom
[error]         at lmcoursier.CoursierDependencyResolution.unresolvedWarningOrThrow(CoursierDependencyResolution.scala:247)
[error]         at lmcoursier.CoursierDependencyResolution.$anonfun$update$35(CoursierDependencyResolution.scala:216)
[error]         at scala.util.Either$LeftProjection.map(Either.scala:573)
[error]         at lmcoursier.CoursierDependencyResolution.update(CoursierDependencyResolution.scala:216)
[error]         at sbt.librarymanagement.DependencyResolution.update(DependencyResolution.scala:60)
[error]         at sbt.internal.LibraryManagement$.resolve$1(LibraryManagement.scala:52)
[error]         at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$12(LibraryManagement.scala:102)
[error]         at sbt.util.Tracked$.$anonfun$lastOutput$1(Tracked.scala:69)
[error]         at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$20(LibraryManagement.scala:115)
[error]         at scala.util.control.Exception$Catch.apply(Exception.scala:228)
[error]         at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$11(LibraryManagement.scala:115)
[error]         at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$11$adapted(LibraryManagement.scala:96)
[error]         at sbt.util.Tracked$.$anonfun$inputChanged$1(Tracked.scala:150)
[error]         at sbt.internal.LibraryManagement$.cachedUpdate(LibraryManagement.scala:129)
[error]         at sbt.Classpaths$.$anonfun$updateTask0$5(Defaults.scala:2950)
[error]         at scala.Function1.$anonfun$compose$1(Function1.scala:49)
[error]         at sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:62)
[error]         at sbt.std.Transform$$anon$4.work(Transform.scala:67)
[error]         at sbt.Execute.$anonfun$submit$2(Execute.scala:281)
[error]         at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:19)
[error]         at sbt.Execute.work(Execute.scala:290)
[error]         at sbt.Execute.$anonfun$submit$1(Execute.scala:281)
[error]         at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:178)
[error]         at sbt.CompletionService$$anon$2.call(CompletionService.scala:37)
[error]         at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error]         at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
[error]         at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error]         at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
[error]         at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
[error]         at java.base/java.lang.Thread.run(Thread.java:834)
[error] (update) sbt.librarymanagement.ResolveException: Error downloading com.typesafe.play:play-iteratees-reactive-streams_2.13:2.6.1
[error]   Not found
[error]   Not found
[error]   not found: /home/******/.ivy2/local/com.typesafe.play/play-iteratees-reactive-streams_2.13/2.6.1/ivys/ivy.xml
[error]   not found: https://repo1.maven.org/maven2/com/typesafe/play/play-iteratees-reactive-streams_2.13/2.6.1/play-iteratees-reactive-streams_2.13-2.6.1.pom
[error]   not found: https://dl.bintray.com/scalaz/releases/com/typesafe/play/play-iteratees-reactive-streams_2.13/2.6.1/play-iteratees-reactive-streams_2.13-2.6.1.pom
[error]   not found: https://repo.akka.io/snapshots/com/typesafe/play/play-iteratees-reactive-streams_2.13/2.6.1/play-iteratees-reactive-streams_2.13-2.6.1.pom

它看起来是先尝试默认的解析器，然后是自定义的解析器。但据我所知，默认的应该可以。
顺便说一句：同样的依赖关系也以同样的方式在旧项目中使用。