diff -r 74afc7e86d00 -r 0eb9f8af479f canfestival/canfestival.py
--- a/canfestival/canfestival.py	Fri Jul 19 15:04:47 2013 +0900
+++ b/canfestival/canfestival.py	Fri Jul 26 14:04:29 2013 +0900
@@ -463,7 +463,8 @@
             if can_driver not in can_drivers :
                 can_driver = can_drivers[0]
             can_drv_ext = self.GetCTRoot().GetBuilder().extension
-            can_driver_name = "libcanfestival_" + can_driver + can_drv_ext
+            can_drv_prefix = self.GetCTRoot().GetBuilder().dlopen_prefix
+            can_driver_name = can_drv_prefix + "libcanfestival_" + can_driver + can_drv_ext
         else:
             can_driver_name = ""