diff --git a/setup.py b/setup.py
index b4c6d77ef..3a08b72c5 100644
--- a/setup.py
+++ b/setup.py
@@ -619,6 +619,8 @@ def download_and_copy_dependencies():
 
 
 def get_package_dirs():
+    if helper.flagtree_backend:
+        return helper.CommonUtils.get_package_dir(get_packages())
     yield ("", "python")
 
     for backend in backends: