From Debian package 0.2.20100524-1

  * Disable UBAC - see http://etbe.coker.com.au/2010/05/26/ubac-selinux-debian/

Index: build.conf
===================================================================
--- build.conf.orig
+++ build.conf
@@ -50,7 +50,7 @@
 
 # User-based access control (UBAC)
 # Enable UBAC for role separations.
-UBAC = y
+UBAC = n
 
 # Custom build options.  This field enables custom
 # build options.  Putting foo here will enable