diff --git a/scripts/chg-len.py b/scripts/chg-len.py
--- a/scripts/chg-len.py
+++ b/scripts/chg-len.py
@@ -3,6 +3,9 @@
 import sys
 
 from mercurial import ui, hg
+from mercurial import util
+
+util.rcpath = lambda : []
 
 if len(sys.argv)>1 and sys.argv[1] in ["-h","--help"]:
     print """