Thanks everybody for your feedback! Much appreciated.
@EwoutH - can you retry your build and let us know how it went?
@yzyuestc
Yes, we found the root cause. We tried to keep LXD OS images as light as possible (helps to keep awesome boot up time for the container) and apparently stripped them with too heavy hand - our Worker needs certain ruby setup being present, regardless of what language is your build actually using. We’ve fixed that (as long as we could cover scenario with our tests).