Issue with Debian Jessie builds due to missing apt-src

Maintainers,

As a quick heads up the buildfarm is hitting an intermittent issue with the package apt-src not being found in the debian mirrors. We’re tracking the issue here:

If you see this error you can ignore it. We are trying to understand why this package is sometimes not available in the apt cache. We will work to retrigger anything that has failed due to this after we resolve the resource loading issue.