diff --git a/.hgsvnexternals b/.hgsvnexternals
new file mode 100644
index 0000000..048f7c8
--- /dev/null
+++ b/.hgsvnexternals
@@ -0,0 +1,3 @@
+[Tools]
+ 2to3 http://svn.python.org/projects/sandbox/trunk/2to3/
+