diff --git a/contrib/playlib/src/mill/playlib/RouterModule.scala b/contrib/playlib/src/mill/playlib/RouterModule.scala
index a23d6fc4804..c578095b6aa 100644
--- a/contrib/playlib/src/mill/playlib/RouterModule.scala
+++ b/contrib/playlib/src/mill/playlib/RouterModule.scala
@@ -64,14 +64,14 @@ trait RouterModule extends ScalaModule with Version {
   def compileRouter: T[CompilationResult] = T.persistent {
     T.log.debug(s"compiling play routes with ${playVersion()} worker")
     routeCompilerWorker.routeCompilerWorker().compile(
-      toolsClasspath().map(_.path),
-      routeFiles().map(_.path),
-      routesAdditionalImport,
-      generateForwardsRouter,
-      generateReverseRouter,
-      namespaceReverseRouter,
-      generatorType,
-      T.dest
+      routerClasspath = playRouterToolsClasspath().map(_.path),
+      files = routeFiles().map(_.path),
+      additionalImports = routesAdditionalImport,
+      forwardsRouter = generateForwardsRouter,
+      reverseRouter = generateReverseRouter,
+      namespaceReverseRouter = namespaceReverseRouter,
+      generatorType = generatorType,
+      dest = T.dest
     )
   }
 
@@ -90,7 +90,12 @@ trait RouterModule extends ScalaModule with Version {
     )
   }
 
+  @deprecated("Use playRouterToolsClasspath instead", "mill after 0.10.0-M1")
   def toolsClasspath = T {
+    playRouterToolsClasspath()
+  }
+
+  def playRouterToolsClasspath = T {
     playRouteCompilerWorkerClasspath() ++ routerClasspath()
   }
 
diff --git a/contrib/scoverage/src/ScoverageModule.scala b/contrib/scoverage/src/ScoverageModule.scala
index 4758a6de0df..049172e281b 100644
--- a/contrib/scoverage/src/ScoverageModule.scala
+++ b/contrib/scoverage/src/ScoverageModule.scala
@@ -63,7 +63,12 @@ trait ScoverageModule extends ScalaModule { outer: ScalaModule =>
     ivy"org.scoverage:::scalac-scoverage-plugin:${outer.scoverageVersion()}"
   }
 
+  @deprecated("Use scoverageToolsClasspath instead.", "mill after 0.10.0-M1")
   def toolsClasspath: T[Agg[PathRef]] = T {
+    scoverageToolsClasspath()
+  }
+
+  def scoverageToolsClasspath: T[Agg[PathRef]] = T {
     scoverageReportWorkerClasspath() ++
       resolveDeps(T.task {
         Agg(ivy"org.scoverage:scalac-scoverage-plugin_${mill.BuildInfo.scalaVersion}:${outer.scoverageVersion()}")
@@ -90,7 +95,7 @@ trait ScoverageModule extends ScalaModule { outer: ScalaModule =>
     def doReport(reportType: ReportType): Task[Unit] = T.task {
       ScoverageReportWorker
         .scoverageReportWorker()
-        .bridge(toolsClasspath().map(_.path))
+        .bridge(scoverageToolsClasspath().map(_.path))
         .report(reportType, allSources().map(_.path), Seq(data().path))
     }
 
diff --git a/contrib/scoverage/src/ScoverageReport.scala b/contrib/scoverage/src/ScoverageReport.scala
index 31e95460190..fb85ec88cd1 100644
--- a/contrib/scoverage/src/ScoverageReport.scala
+++ b/contrib/scoverage/src/ScoverageReport.scala
@@ -104,7 +104,7 @@ trait ScoverageReport extends Module {
       val dataPaths: Seq[Path] = T.sequence(dataTasks)().map(_.path)
       scoverageReportWorkerModule
         .scoverageReportWorker()
-        .bridge(workerModule.toolsClasspath().map(_.path))
+        .bridge(workerModule.scoverageToolsClasspath().map(_.path))
         .report(reportType, sourcePaths, dataPaths)
       PathRef(T.dest)
     }
diff --git a/scalajslib/src/ScalaJSModule.scala b/scalajslib/src/ScalaJSModule.scala
index ed8db829279..3d155e229a9 100644
--- a/scalajslib/src/ScalaJSModule.scala
+++ b/scalajslib/src/ScalaJSModule.scala
@@ -64,31 +64,34 @@ trait ScalaJSModule extends scalalib.ScalaModule { outer =>
     )
   }
 
-  def toolsClasspath = T { scalaJSWorkerClasspath() ++ scalaJSLinkerClasspath() }
+  @deprecated("Use scalaJSToolsClasspath instead", "mill after 0.10.0-M1")
+  def toolsClasspath = T { scalaJSToolsClasspath() }
+
+  def scalaJSToolsClasspath = T { scalaJSWorkerClasspath() ++ scalaJSLinkerClasspath() }
 
   def fastOpt = T {
     link(
-      ScalaJSWorkerApi.scalaJSWorker(),
-      toolsClasspath(),
-      runClasspath(),
-      finalMainClassOpt().toOption,
+      worker = ScalaJSWorkerApi.scalaJSWorker(),
+      toolsClasspath = scalaJSToolsClasspath(),
+      runClasspath = runClasspath(),
+      mainClass = finalMainClassOpt().toOption,
       testBridgeInit = false,
-      FastOpt,
-      moduleKind(),
-      useECMAScript2015()
+      mode = FastOpt,
+      moduleKind = moduleKind(),
+      useECMAScript2015 = useECMAScript2015()
     )
   }
 
   def fullOpt = T {
     link(
-      ScalaJSWorkerApi.scalaJSWorker(),
-      toolsClasspath(),
-      runClasspath(),
-      finalMainClassOpt().toOption,
+      worker = ScalaJSWorkerApi.scalaJSWorker(),
+      toolsClasspath = scalaJSToolsClasspath(),
+      runClasspath = runClasspath(),
+      mainClass = finalMainClassOpt().toOption,
       testBridgeInit = false,
-      FullOpt,
-      moduleKind(),
-      useECMAScript2015()
+      mode = FullOpt,
+      moduleKind = moduleKind(),
+      useECMAScript2015 = useECMAScript2015()
     )
   }
 
@@ -99,7 +102,7 @@ trait ScalaJSModule extends scalalib.ScalaModule { outer =>
       case Left(err) => Result.Failure(err)
       case Right(_) =>
         ScalaJSWorkerApi.scalaJSWorker().run(
-          toolsClasspath().map(_.path),
+          scalaJSToolsClasspath().map(_.path),
           jsEnvConfig(),
           fastOpt().path.toIO
         )
@@ -150,9 +153,11 @@ trait ScalaJSModule extends scalalib.ScalaModule { outer =>
     ).map(PathRef(_))
   }
 
-  override def mandatoryScalacOptions = super.mandatoryScalacOptions() ++ {
-    if (isScala3(scalaVersion())) Seq("-scalajs")
-    else Seq.empty
+  override def mandatoryScalacOptions = T {
+    super.mandatoryScalacOptions() ++ {
+      if (isScala3(scalaVersion())) Seq("-scalajs")
+      else Seq.empty
+    }
   }
 
   override def scalacPluginIvyDeps = T {
@@ -204,7 +209,7 @@ trait TestScalaJSModule extends ScalaJSModule with TestModule {
   def fastOptTest = T {
     link(
       ScalaJSWorkerApi.scalaJSWorker(),
-      toolsClasspath(),
+      scalaJSToolsClasspath(),
       scalaJSTestDeps() ++ runClasspath(),
       None,
       testBridgeInit = true,
@@ -222,7 +227,7 @@ trait TestScalaJSModule extends ScalaJSModule with TestModule {
   ): Task[(String, Seq[TestRunner.Result])] = T.task {
 
     val (close, framework) = mill.scalajslib.ScalaJSWorkerApi.scalaJSWorker().getFramework(
-      toolsClasspath().map(_.path),
+      scalaJSToolsClasspath().map(_.path),
       jsEnvConfig(),
       testFramework(),
       fastOptTest().path.toIO,