Enable building of Carbon toolbox modules with unix-Python.
diff --git a/Mac/Modules/qdoffs/qdoffsscan.py b/Mac/Modules/qdoffs/qdoffsscan.py
index 4f188a6..b2b55b2 100644
--- a/Mac/Modules/qdoffs/qdoffsscan.py
+++ b/Mac/Modules/qdoffs/qdoffsscan.py
@@ -1,9 +1,8 @@
 # Scan an Apple header file, generating a Python file of generator calls.
 import sys
 import os
-BGENDIR=os.path.join(sys.prefix, ':Tools:bgen:bgen')
+from bgenlocations import TOOLBOXDIR, BGENDIR
 sys.path.append(BGENDIR)
-from bgenlocations import TOOLBOXDIR
 
 from scantools import Scanner