Errors building custom ubuntu-core images

Steve Langasek steve.langasek at
Fri Oct 14 00:14:42 UTC 2016

Hi Luke,

On Thu, Oct 13, 2016 at 04:08:59PM -0700, Luke Williams wrote:
> Hello,

> I am trying to build a custom ubuntu-core image with a custom kernel.


> I the sign the assertion and have a valid assertion model, but when I try
> to build, I get the following error:

> $ sudo /snap/bin/ubuntu-image -c stable -o onl-snappy.img --extra-snaps
> onl-kernel_3.18.25_amd64.snap pc.model

> FileNotFoundError: [Errno 2] No such file or directory:
> '/tmp/tmpfmnriroe/unpack/gadget/meta/gadget.yaml'

This error is because the new gadget snaps that are compatible with
ubuntu-image have not yet been promoted to the stable channel; at the
moment, you must use -c edge instead to get the right version.

I don't know if there is anything blocking their promotion to the stable
channel at this point.  Michael, Oliver, can you comment?

Steve Langasek                   Give me a lever long enough and a Free OS
Debian Developer                   to set it on, and I can move the world.
Ubuntu Developer                          
slangasek at                                     vorlon at
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