Jetstream boards are failing with the error:

webserver-0.0.1-r1741: fatal: destination path '/build/whirlwind/tmp/portage/chromeos-base/webserver-0.0.1-r1741/work/webserver-0.0.1/platform2/webserver' already exists and is not an empty directory.
webserver-0.0.1-r1741:  * ERROR: chromeos-base/webserver-0.0.1-r1741::chromiumos failed (unpack phase):
webserver-0.0.1-r1741:  *   Can't clone /mnt/host/source/src/aosp/system/webservd.