$ ubuntu-device-flash --channel=devel-proposed --bootstrap --wipe
DEPRECATED: Implicit 'touch' subcommand assumed
2015/01/12 23:19:24 Expecting the device to be in the bootloader... waiting
2015/01/12 23:19:24 Device is |mako|
2015/01/12 23:19:27 Flashing version 63 from devel-proposed channel and server https://system-image.ubuntu.com to device mako
2015/01/12 23:20:02 Get https://system-image.ubuntu.com/gpg/image-signing.tar.xz.asc: EOF