xmbc nightly on ATV

Very useful instructions

 

http://forum.xbmc.org/showpost.php?p=768428&postcount=85

i got an erro when enter the last line.  file doesnt exist.  cant find archive.   any idea?

it says file or file or directory does not exist.  another site said cd to private/var/tmp before installing nightlies...is that maybe the issue?  thx