object stream is not a member of package akka - akka

Question

I've below build.sbt file -
ThisBuild / version := "0.1.0-SNAPSHOT"
ThisBuild / scalaVersion := "2.13.7"
val akkaVersion = "2.6.18"
lazy val root = (project in file("."))
.settings(
name := "akka-sbt-multijvm-issue"
)
libraryDependencies ++= Seq("com.typesafe.akka" %% "akka-actor" % akkaVersion,
"com.typesafe.akka" %% "akka-stream" % akkaVersion,
"com.typesafe.akka" %% "akka-cluster" % akkaVersion)
I've below main code -
package com.example
object MaterializerApp extends App {
import akka.stream.Materializer
}
when I compile the code I get the below error -
sbt clean compile
[info] welcome to sbt 1.6.1 (Azul Systems, Inc. Java 11.0.12)
[info] loading global plugins from /Users/rajkumar.natarajan/.sbt/1.0/plugins
[info] loading settings for project akka-sbt-multijvm-issue-build from plugins.sbt ...
[info] loading project definition from /Users/rajkumar.natarajan/Documents/Coding/akka-sbt-multijvm-issue/project
[info] loading settings for project root from build.sbt ...
[info] set current project to akka-sbt-multijvm-issue (in build file:/Users/rajkumar.natarajan/Documents/Coding/akka-sbt-multijvm-issue/)
[info] Executing in batch mode. For better performance use sbt's shell
[success] Total time: 0 s, completed Jan 5, 2022, 9:13:16 PM
[info] compiling 1 Scala source to /Users/rajkumar.natarajan/Documents/Coding/akka-sbt-multijvm-issue/target/scala-2.13/classes ...
[error] /Users/rajkumar.natarajan/Documents/Coding/akka-sbt-multijvm-issue/src/main/scala/com/example/MaterializerApp.scala:5:15: object stream is not a member of package akka
[error] import akka.stream.Materializer
^
[error] one error found
[error] (Compile / compileIncremental) Compilation failed
[error] Total time: 4 s, completed Jan 5, 2022, 9:13:21 PM
Note: When I change the akkaVersion to 2.6.17, the compilation succeeds.
How can I fix this error?