diff --git a/tools/helpers/build.gradle b/tools/helpers/build.gradle
index 52ddb8dded9..b177bfcf1ed 100644
--- a/tools/helpers/build.gradle
+++ b/tools/helpers/build.gradle
@@ -25,11 +25,17 @@ apply plugin: 'kotlin'
 apply plugin: NativeInteropPlugin
 
 configurations {
+    unTar
+    compile.extendsFrom unTar
     cli_bc.extendsFrom compile
 }
 
 dependencies {
     compile project(path: ':backend.native', configuration: 'cli_bc')
+    // https://mvnrepository.com/artifact/org.codehaus.plexus/plexus-archiver
+    unTar group: 'org.codehaus.plexus', name: 'plexus-archiver', version: '3.4'
+    // https://mvnrepository.com/artifact/org.codehaus.plexus/plexus-container-default
+    unTar group: 'org.codehaus.plexus', name: 'plexus-container-default', version: '1.7.1'
     cli_bc jar.outputs.files
 }
 
@@ -39,6 +45,13 @@ sourceSets {
     }
 }
 
+// TODO: shrink jar
+jar {
+    from {
+        configurations.unTar.collect { it.isDirectory() ? it : zipTree(it) }
+    }
+}
+
 def testDependencies = project.file("${sourceSets.testOutputLocal.output.dirs.singleFile.absolutePath}/dependencies")
 
 void prepareDependenciesDir(File testDependencies) {
diff --git a/tools/helpers/src/main/kotlin/DependencyDownloader.kt b/tools/helpers/src/main/kotlin/DependencyDownloader.kt
index c7637dc087a..58fa0afced5 100644
--- a/tools/helpers/src/main/kotlin/DependencyDownloader.kt
+++ b/tools/helpers/src/main/kotlin/DependencyDownloader.kt
@@ -1,5 +1,8 @@
 package org.jetbrains.kotlin.konan
 
+import org.codehaus.plexus.archiver.tar.TarGZipUnArchiver
+import org.codehaus.plexus.logging.Logger
+import org.codehaus.plexus.logging.console.ConsoleLogger
 import java.io.*
 import java.net.URL
 import java.util.Properties
@@ -51,14 +54,12 @@ class DependencyDownloader(dependenciesRoot: File, val properties: Properties, v
     }
 
     private fun extract(tarGz: File) {
-        val tarProcess = ProcessBuilder().apply {
-            command("tar", "-x", "-f", "${tarGz.canonicalPath}")
-            directory(tarGz.parentFile)
-        }.start()
-        tarProcess.waitFor()
-        if (tarProcess.exitValue() != 0) {
-            throw RuntimeException("Cannot extract archive with dependency: ${tarGz.canonicalPath}")
-        }
+        val ua = TarGZipUnArchiver()
+        ua.sourceFile = tarGz
+        ua.destDirectory = dependenciesRoot
+        // Workaround. This archive library crashes if the logger is not set.
+        ua.enableLogging(ConsoleLogger(Logger.LEVEL_DISABLED, "Logger"))
+        ua.extract()
     }
 
     private val Long.humanReadable: String
@@ -114,7 +115,6 @@ class DependencyDownloader(dependenciesRoot: File, val properties: Properties, v
                 Thread.sleep(1000) // We can use condition variable here.
                 updateProgressMsg(url.toString(), currentBytes, totalBytes)
             }
-            println("Done.")
             if (downloadError != null) {
                 throw RuntimeException("Cannot download dependency: $url", downloadError)
             }