diff --git a/scripts/build_exo.py b/scripts/build_exo.py
index cee0ef72..6a204ebe 100644
--- a/scripts/build_exo.py
+++ b/scripts/build_exo.py
@@ -2,6 +2,8 @@ import site
 import subprocess
 import sys
 import os 
+import pkgutil
+
 def run():
     site_packages = site.getsitepackages()[0]
     command = [