diff --git a/soft/compiler.tvm/customize.py b/soft/compiler.tvm/customize.py
index b28b325b..0741e8c2 100644
--- a/soft/compiler.tvm/customize.py
+++ b/soft/compiler.tvm/customize.py
@@ -10,6 +10,8 @@
 
 import os
 
+extra_dirs=[]
+
 ##############################################################################
 # customize directories to automatically find and register software