diff --git a/make_post_sell/lib/karaoke.py b/make_post_sell/lib/karaoke.py
index 7ba867b..eb2fed3 100644
--- a/make_post_sell/lib/karaoke.py
+++ b/make_post_sell/lib/karaoke.py
@@ -100,8 +100,9 @@ def process_karaoke(s3_client, bucket, s3_key, s3_path,
             return None
 
         if not result.get("success") or result.get("exit_code") != 0:
-            log.warning("Unsandbox execute non-zero exit: success=%s exit_code=%s",
-                        result.get("success"), result.get("exit_code"))
+            log.warning("Unsandbox execute non-zero exit: success=%s exit_code=%s stdout=%.500s stderr=%.500s",
+                        result.get("success"), result.get("exit_code"),
+                        result.get("stdout", ""), result.get("stderr", ""))
             return None
 
         # 5. Extract artifacts and upload to S3