Steve suggests adding "try again later", so how about this:
"After updating your packaging information, the essential package '%s' could not be located. Please check the availability of your archive mirrors, which may be overloaded or otherwise inaccessible. Please try again later."
Steve suggests adding "try again later", so how about this:
"After updating your packaging information, the essential package '%s' could not be located. Please check the availability of your archive mirrors, which may be overloaded or otherwise inaccessible. Please try again later."