diff --git a/tools/helpers/build.gradle b/tools/helpers/build.gradle
index b177bfcf1ed..52ddb8dded9 100644
--- a/tools/helpers/build.gradle
+++ b/tools/helpers/build.gradle
@@ -25,17 +25,11 @@ 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
 }
 
@@ -45,13 +39,6 @@ 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 58fa0afced5..c7637dc087a 100644
--- a/tools/helpers/src/main/kotlin/DependencyDownloader.kt
+++ b/tools/helpers/src/main/kotlin/DependencyDownloader.kt
@@ -1,8 +1,5 @@
 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
@@ -54,12 +51,14 @@ class DependencyDownloader(dependenciesRoot: File, val properties: Properties, v
     }
 
     private fun extract(tarGz: File) {
-        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()
+        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}")
+        }
     }
 
     private val Long.humanReadable: String
@@ -115,6 +114,7 @@ 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)
             }