diff --git a/buildSrc/src/main/kotlin/SmartJavaExec.kt b/buildSrc/src/main/kotlin/SmartJavaExec.kt
index 1264299ef4f..6f48380ad5c 100644
--- a/buildSrc/src/main/kotlin/SmartJavaExec.kt
+++ b/buildSrc/src/main/kotlin/SmartJavaExec.kt
@@ -8,9 +8,13 @@ import org.gradle.kotlin.dsl.task
  * that can be found in the license/LICENSE.txt file.
  */
 
-fun Project.smartJavaExec(configure: JavaExec.() -> Unit) = task<JavaExec> javaExec@{
+fun Project.smartJavaExec(configure: JavaExec.() -> Unit) = task<JavaExec> {
     configure()
+    passClasspathInJar()
+}
 
+// Moves the classpath into a jar metadata, to shorten the command line length and to avoid hitting the limit on Windows
+fun JavaExec.passClasspathInJar() {
     val jarTask = project.task("${name}WriteClassPath", Jar::class) {
         val classpath = classpath
         val main = main
@@ -28,12 +32,10 @@ fun Project.smartJavaExec(configure: JavaExec.() -> Unit) = task<JavaExec> javaE
                 )
             }
         }
-        archiveName = "$main.${this@javaExec.name}.classpath.container.$extension"
+        archiveName = "$main.${this@passClasspathInJar.name}.classpath.container.$extension"
         destinationDir = temporaryDir
     }
 
-
-
     dependsOn(jarTask)
 
     doFirst {
@@ -43,6 +45,5 @@ fun Project.smartJavaExec(configure: JavaExec.() -> Unit) = task<JavaExec> javaE
         val copyArgs = args.orEmpty().toList()
         args(jarTask.outputs.files.singleFile)
         args(copyArgs)
-
     }
 }
diff --git a/compiler/ir/serialization.js/build.gradle.kts b/compiler/ir/serialization.js/build.gradle.kts
index 0b65c92f8d1..b6201f7a715 100644
--- a/compiler/ir/serialization.js/build.gradle.kts
+++ b/compiler/ir/serialization.js/build.gradle.kts
@@ -21,7 +21,7 @@ sourceSets {
     "test" { projectDefault() }
 }
 
-val generateIrRuntimeKlib by smartJavaExec {
+val generateIrRuntimeKlib by task<NoDebugJavaExec> {
     val inDirs = arrayOf(fileFrom(rootDir, "core", "builtins", "src"),
                          fileFrom(rootDir, "core", "builtins", "native"),
                          fileFrom(rootDir, "libraries", "stdlib", "common", "src"),
@@ -38,6 +38,8 @@ val generateIrRuntimeKlib by smartJavaExec {
     classpath = sourceSets.test.get().runtimeClasspath
     main = "org.jetbrains.kotlin.ir.backend.js.GenerateIrRuntimeKt"
     workingDir = rootDir
+
+    passClasspathInJar()
 }
 
 testsJar {}
\ No newline at end of file