diff --git a/libraries/tools/kotlin-source-map-loader/build.gradle.kts b/libraries/tools/kotlin-source-map-loader/build.gradle.kts
index 971f1f51172..ed45e5451e4 100644
--- a/libraries/tools/kotlin-source-map-loader/build.gradle.kts
+++ b/libraries/tools/kotlin-source-map-loader/build.gradle.kts
@@ -31,7 +31,7 @@ tasks {
         }
         // Without it several yarns can works incorrectly
         (this as YarnTask).apply {
-            args = listOf("--network-concurrency", "1", "--mutex", "network")
+            args = args + "--network-concurrency" + "1" + "--mutex" + "network"
         }
     }
 
diff --git a/libraries/tools/kotlin-test-js-runner/build.gradle.kts b/libraries/tools/kotlin-test-js-runner/build.gradle.kts
index 71218f5ec15..61e9e485d48 100644
--- a/libraries/tools/kotlin-test-js-runner/build.gradle.kts
+++ b/libraries/tools/kotlin-test-js-runner/build.gradle.kts
@@ -35,7 +35,7 @@ tasks {
         }
         // Without it several yarns can works incorrectly
         (this as YarnTask).apply {
-            args = listOf("--network-concurrency", "1", "--mutex", "network")
+            args = args + "--network-concurrency" + "1" + "--mutex" + "network"
         }
     }