Build fix

Author: timothyschoen

build.py

@@ -114,7 +114,9 @@
 
             plugin_filename = name + extension;
             os.makedirs(target_dir, exist_ok=True)
+            src = os.path.join(format_path, plugin_filename);
+            dst = os.path.join(target_dir, plugin_filename);
             if os.path.isdir(src):
-                shutil.copytree(os.path.join(format_path, plugin_filename), os.path.join(target_dir, plugin_filename))
+                shutil.copytree(src, dst)
             else:
-                shutil.copy2(os.path.join(format_path, plugin_filename), os.path.join(target_dir, plugin_filename))
+                shutil.copy2(src, dst)