diff -r ae92c3eee88e -r 0d83ad967bf8 mercurial/repair.py
--- a/mercurial/repair.py	Fri Jun 10 00:25:07 2016 -0400
+++ b/mercurial/repair.py	Fri Jun 10 00:12:33 2016 -0400
@@ -9,6 +9,7 @@
 from __future__ import absolute_import
 
 import errno
+import hashlib
 
 from .i18n import _
 from .node import short
@@ -35,7 +36,7 @@
     # Include a hash of all the nodes in the filename for uniqueness
     allcommits = repo.set('%ln::%ln', bases, heads)
     allhashes = sorted(c.hex() for c in allcommits)
-    totalhash = util.sha1(''.join(allhashes)).hexdigest()
+    totalhash = hashlib.sha1(''.join(allhashes)).hexdigest()
     name = "%s/%s-%s-%s.hg" % (backupdir, short(node), totalhash[:8], suffix)
 
     comp = None