diff --git a/server/src/main/java/com/defold/extender/AsyncBuilder.java b/server/src/main/java/com/defold/extender/AsyncBuilder.java
index 47d611a9..d936f072 100644
--- a/server/src/main/java/com/defold/extender/AsyncBuilder.java
+++ b/server/src/main/java/com/defold/extender/AsyncBuilder.java
@@ -167,7 +167,7 @@ public void cleanUnusedResults() {
         try {
             if (jobResultLocation.exists())
             {
-                Files.walk(jobResultLocation.toPath())
+                Files.list(jobResultLocation.toPath())
                         .filter(Files::isDirectory)
                         .filter(path -> ! jobResultLocation.toPath().equals(path))
                         .forEach(path -> {