Build fails because archive release file has expired?

[Robert Key <rob54321@mighty.co.za>]

Hi I don't know if this should be posted here, but the live build fails 
when building squeeze with the following message:

E: Release file expired, ignoring 
http://localhost/linuxarchive/dists/squeeze/Release (invalid since 1d 5h 
18min 18s)
P: Begin unmounting filesystems...

I can install squeeze from this very archive with no problems. I can 
also mirror this archive with no problems. Archives don't expire on CDs.
What does this message mean? Can I somehow ignore the release file?

Thanks,
  Rob