backend.py: Change default lock directory.

All of the other state things end up under the working tree, so this
should too.

diff --git a/backend.py b/backend.py
index d6fac78..576486c 100644 (file)
--- a/backend.py
+++ b/backend.py
@@ -37,7 +37,7 @@ import util as U
 CONF.DEFAULTS.update(
 
   ## A directory in which we can create lockfiles.
-  LOCKDIR = OS.path.join(ENV['HOME'], 'var', 'lock', 'chpwd'))
+  LOCKDIR = OS.path.join(HOME, 'lock'))
 
 ###--------------------------------------------------------------------------
 ### Utilities.