Comment 5 for bug 1465879

Can you give the PPA https://launchpad.net/~snappy-dev/+archive/ubuntu/tools-proposed a try and report back the results?

With that PPA (and ubuntu-device-flash 0.24-0ubuntu2), I was able to create an image with docker pre-installed:

rsalveti@evasys:/tmp/init$ sudo ubuntu-device-flash core 15.04 --channel edge --enable-ssh --developer-mode --install docker --output x86.img
[sudo] password for rsalveti:
Determining oem configuration
Starting download of generic-amd64
40.93 KB / 40.93 KB [] 100.00 % 89.51 KB/s
Done
Fetching information from server...
Downloading and setting up...
Installing generic-amd64
Starting download of generic-amd64
40.93 KB / 40.93 KB [] 100.00 % 89.25 KB/s
Done
Installing docker
Starting download of docker
8.36 MB / 8.36 MB [_] 100.00 % 617.14 KB/s
Done
Enabling developer mode...
New image complete
Summary:
 Output: x86.img
 Architecture: amd64
 Channel: edge
 Version: 92
Launch by running: kvm -m 768 x86.img