--- a/mercurial/cmdutil.py	Wed Mar 09 02:07:40 2016 +0000
+++ b/mercurial/cmdutil.py	Wed Mar 09 01:17:02 2016 +0000
@@ -835,6 +835,8 @@
             if inst.startswith('unlink:'):
                 lockpath = inst[7:]
                 os.unlink(lockpath)
+            elif inst.startswith('chdir:'):
+                os.chdir(inst[6:])
             elif inst != 'none':
                 raise error.Abort(_('invalid value for --daemon-postexec: %s')
                                   % inst)