Hello,<br />I recently faced a similar one in my company, the issue was the new antivirus.<br />Has been discovered only for some few packages and so after a clean rebuild (that has required t ore downloaded every packages). Errors were on do_fetch and do_unpack depending of the packages.<br />Not sure it's related to your issue, but my be something to check.<br />I'm using kirkstone 4.0.10 actually.<br />Joel