diff --git a/benchmarks/build.gradle b/benchmarks/build.gradle
deleted file mode 100644
index a192f2795e..0000000000
--- a/benchmarks/build.gradle
+++ /dev/null
@@ -1,79 +0,0 @@
-/*
- * Copyright 2016-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
- */
-sourceCompatibility = 1.8
-targetCompatibility = 1.8
-
-apply plugin: "net.ltgt.apt"
-apply plugin: "com.github.johnrengelman.shadow"
-apply plugin: "me.champeau.gradle.jmh"
-
-repositories {
-    maven { url "https://repo.typesafe.com/typesafe/releases/" }
-}
-
-compileJmhKotlin {
-    kotlinOptions {
-        jvmTarget = "1.8"
-        freeCompilerArgs += ['-Xjvm-default=enable']
-    }
-}
-
-/*
- * Due to a bug in the inliner it sometimes does not remove inlined symbols (that are later renamed) from unused code paths,
- * and it breaks JMH that tries to post-process these symbols and fails because they are renamed.
- */
-task removeRedundantFiles(type: Delete) {
-    delete "$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble/FlowPlaysScrabbleOpt\$play\$buildHistoOnScore\$1\$\$special\$\$inlined\$filter\$1\$1.class"
-    delete "$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble/FlowPlaysScrabbleOpt\$play\$nBlanks\$1\$\$special\$\$inlined\$map\$1\$1.class"
-    delete "$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble/FlowPlaysScrabbleOpt\$play\$score2\$1\$\$special\$\$inlined\$map\$1\$1.class"
-    delete "$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble/FlowPlaysScrabbleOpt\$play\$bonusForDoubleLetter\$1\$\$special\$\$inlined\$map\$1\$1.class"
-    delete "$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble/FlowPlaysScrabbleOpt\$play\$nBlanks\$1\$\$special\$\$inlined\$map\$1\$2\$1.class"
-    delete "$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble/FlowPlaysScrabbleOpt\$play\$bonusForDoubleLetter\$1\$\$special\$\$inlined\$map\$1\$2\$1.class"
-    delete "$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble/FlowPlaysScrabbleOpt\$play\$score2\$1\$\$special\$\$inlined\$map\$1\$2\$1.class"
-    delete "$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble/FlowPlaysScrabbleOptKt\$\$special\$\$inlined\$collect\$1\$1.class"
-    delete "$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble/FlowPlaysScrabbleOptKt\$\$special\$\$inlined\$collect\$2\$1.class"
-    delete "$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble/FlowPlaysScrabbleOpt\$play\$histoOfLetters\$1\$\$special\$\$inlined\$fold\$1\$1.class"
-    delete "$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble/FlowPlaysScrabbleBase\$play\$buildHistoOnScore\$1\$\$special\$\$inlined\$filter\$1\$1.class"
-    delete "$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble/FlowPlaysScrabbleBase\$play\$histoOfLetters\$1\$\$special\$\$inlined\$fold\$1\$1.class"
-    delete "$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble//SaneFlowPlaysScrabble\$play\$buildHistoOnScore\$1\$\$special\$\$inlined\$filter\$1\$1.class"
-
-    // Primes
-    delete "$buildDir/classes/kotlin/jmh/benchmarks/flow/misc/Numbers\$\$special\$\$inlined\$filter\$1\$2\$1.class"
-    delete "$buildDir/classes/kotlin/jmh/benchmarks/flow/misc/Numbers\$\$special\$\$inlined\$filter\$1\$1.class"
-}
-
-jmhRunBytecodeGenerator.dependsOn(removeRedundantFiles)
-
-// It is better to use the following to run benchmarks, otherwise you may get unexpected errors:
-// ./gradlew --no-daemon cleanJmhJar jmh -Pjmh="MyBenchmark"
-jmh {
-    jmhVersion = '1.21'
-    duplicateClassesStrategy DuplicatesStrategy.INCLUDE
-    failOnError = true
-    resultFormat = 'CSV'
-    if (project.hasProperty('jmh')) {
-        include = ".*" + project.jmh + ".*"
-    }
-//    includeTests = false
-}
-
-jmhJar {
-    baseName 'benchmarks'
-    classifier = null
-    version = null
-    destinationDir = file("$rootDir")
-}
-
-dependencies {
-    compile "org.openjdk.jmh:jmh-core:1.21"
-    compile "io.projectreactor:reactor-core:$reactor_vesion"
-    compile 'io.reactivex.rxjava2:rxjava:2.1.9'
-    compile "com.github.akarnokd:rxjava2-extensions:0.20.8"
-
-    compile "org.openjdk.jmh:jmh-core:1.21"
-    compile 'com.typesafe.akka:akka-actor_2.12:2.5.0'
-    compile project(':kotlinx-coroutines-core')
-    // add jmh dependency on main
-    jmh sourceSets.main.runtimeClasspath
-}
diff --git a/benchmarks/build.gradle.kts b/benchmarks/build.gradle.kts
new file mode 100644
index 0000000000..0841129148
--- /dev/null
+++ b/benchmarks/build.gradle.kts
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2016-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+ */
+
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+plugins {
+    id("net.ltgt.apt")
+    id("com.github.johnrengelman.shadow")
+    id("me.champeau.gradle.jmh")
+}
+
+repositories {
+    maven("https://repo.typesafe.com/typesafe/releases/")
+}
+
+tasks.withType<KotlinCompile>().configureEach {
+    kotlinOptions.jvmTarget = "1.8"
+}
+
+tasks.compileJmhKotlin {
+    kotlinOptions.freeCompilerArgs += "-Xjvm-default=enable"
+}
+
+/*
+ * Due to a bug in the inliner it sometimes does not remove inlined symbols (that are later renamed) from unused code paths,
+ * and it breaks JMH that tries to post-process these symbols and fails because they are renamed.
+ */
+val removeRedundantFiles = tasks.register<Delete>("removeRedundantFiles") {
+    delete("$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble/FlowPlaysScrabbleOpt\$play\$buildHistoOnScore\$1\$\$special\$\$inlined\$filter\$1\$1.class")
+    delete("$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble/FlowPlaysScrabbleOpt\$play\$nBlanks\$1\$\$special\$\$inlined\$map\$1\$1.class")
+    delete("$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble/FlowPlaysScrabbleOpt\$play\$score2\$1\$\$special\$\$inlined\$map\$1\$1.class")
+    delete("$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble/FlowPlaysScrabbleOpt\$play\$bonusForDoubleLetter\$1\$\$special\$\$inlined\$map\$1\$1.class")
+    delete("$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble/FlowPlaysScrabbleOpt\$play\$nBlanks\$1\$\$special\$\$inlined\$map\$1\$2\$1.class")
+    delete("$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble/FlowPlaysScrabbleOpt\$play\$bonusForDoubleLetter\$1\$\$special\$\$inlined\$map\$1\$2\$1.class")
+    delete("$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble/FlowPlaysScrabbleOpt\$play\$score2\$1\$\$special\$\$inlined\$map\$1\$2\$1.class")
+    delete("$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble/FlowPlaysScrabbleOptKt\$\$special\$\$inlined\$collect\$1\$1.class")
+    delete("$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble/FlowPlaysScrabbleOptKt\$\$special\$\$inlined\$collect\$2\$1.class")
+    delete("$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble/FlowPlaysScrabbleOpt\$play\$histoOfLetters\$1\$\$special\$\$inlined\$fold\$1\$1.class")
+    delete("$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble/FlowPlaysScrabbleBase\$play\$buildHistoOnScore\$1\$\$special\$\$inlined\$filter\$1\$1.class")
+    delete("$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble/FlowPlaysScrabbleBase\$play\$histoOfLetters\$1\$\$special\$\$inlined\$fold\$1\$1.class")
+    delete("$buildDir/classes/kotlin/jmh/benchmarks/flow/scrabble//SaneFlowPlaysScrabble\$play\$buildHistoOnScore\$1\$\$special\$\$inlined\$filter\$1\$1.class")
+
+    // Primes
+    delete("$buildDir/classes/kotlin/jmh/benchmarks/flow/misc/Numbers\$\$special\$\$inlined\$filter\$1\$2\$1.class")
+    delete("$buildDir/classes/kotlin/jmh/benchmarks/flow/misc/Numbers\$\$special\$\$inlined\$filter\$1\$1.class")
+}
+
+tasks.jmhRunBytecodeGenerator {
+    dependsOn(removeRedundantFiles)
+}
+
+// It is better to use the following to run benchmarks, otherwise you may get unexpected errors:
+// ./gradlew --no-daemon cleanJmhJar jmh -Pjmh="MyBenchmark"
+jmh {
+    jmhVersion = "1.21"
+    duplicateClassesStrategy = DuplicatesStrategy.INCLUDE
+    failOnError = true
+    resultFormat = "CSV"
+    project.findProperty("jmh")?.also {
+        include = listOf(".*$it.*")
+    }
+//    includeTests = false
+}
+
+tasks.jmhJar {
+    baseName = "benchmarks"
+    classifier = null
+    version = null
+    destinationDir = file("$rootDir")
+}
+
+dependencies {
+    compile("org.openjdk.jmh:jmh-core:1.21")
+    compile("io.projectreactor:reactor-core:${property("reactor_vesion")}")
+    compile("io.reactivex.rxjava2:rxjava:2.1.9")
+    compile("com.github.akarnokd:rxjava2-extensions:0.20.8")
+
+    compile("org.openjdk.jmh:jmh-core:1.21")
+    compile("com.typesafe.akka:akka-actor_2.12:2.5.0")
+    compile(project(":kotlinx-coroutines-core"))
+
+    // add jmh dependency on main
+    jmhImplementation(sourceSets.main.get().runtimeClasspath)
+}