# xxx what is that ?
#btrfs subvolume create $lxc_dir/lxc-squeeze-x86_64
# copy the slice image into the btrfs ?
- rsync -av $sliceimage_dir/$slicefamily/ $lxc_dir/$slicefamily/
+ rsync -av --delete $sliceimage_dir/$slicefamily/ $lxc_dir/$slicefamily/
done
}