diff -r cd007fc4f2ea -r 37a747ad6fd4 misc/migration/3.4.0_common.py
--- a/misc/migration/3.4.0_common.py	Fri Jul 24 15:28:03 2009 +0200
+++ b/misc/migration/3.4.0_common.py	Fri Jul 24 15:43:11 2009 +0200
@@ -1,1 +1,6 @@
+from os.path import join
+from cubicweb.toolsutils import create_dir
+
 option_renamed('pyro-application-id', 'pyro-instance-id')
+
+create_dir(join(config.appdatahome, 'backup'))