diff --git a/build_helper.py b/build_helper.py
index e4da83bb5bd88049c24db843c74159debde9cd90..356427b1592f0449c6b91c53e43190378d363b21 100755
--- a/build_helper.py
+++ b/build_helper.py
@@ -160,23 +160,26 @@ def main_work():
     patch_dir = os.path.realpath(args['patch_dir'])
 
     md5_dir = os.path.join(out_src_path, "patches_md5")
+    print("zhl11111111111111111")
     if source_has_changed(out_src_path, patch_dir, md5_dir):
+        print("zhl222222222222222222")
         print("remove ", out_src_path)
         if os.path.exists(out_src_path):
             shutil.rmtree(out_src_path)
         save_md5s(patch_dir, md5_dir)
-
+        print("zhl333333333333333")
     if os.path.exists(os.path.join(out_src_path, ".status")):
         print("patch files not changed and " + os.path.join(out_src_path, ".status") + " exists.")
         return
 
+    print("zhl44444444444444")
     os.makedirs(out_src_path, exist_ok=True)
     out_src_path = os.path.realpath(out_src_path)
 
     extract_source(in_zip_path, out_src_path)
 
     do_patch(patch_dir, out_src_path + '/source/')
-
+    print("zhl5555555555555555")
     create_status_file(out_src_path)