Problem building Precise Ubuntu Desktop

Hello, linaro-dev,

I am trying to follow the instructions at

https://wiki.linaro.org/Source/ImageBuilding

However, when I run "sudo lh build", I get the following output

P: Setting up cleanup function P: Begin caching bootstrap stage... P: Begin bootstrapping system... P: If the following stage fails, the most likely cause of the problem is with your mirror configuration or a caching proxy. P: Running debootstrap (download-only)... I: Retrieving Release E: Failed getting release file http://ftp.de.debian.org/debian/dists/lenny/Release P: Begin unmounting filesystems...

Why is it trying to download files for lenny?