Container ID 166536 cannot be mapped to a host ID" error on Multistage docker build

[Graham Benton]

I have a multi stage Dockerfile that builds fine on my local machine.

In a bitbucket-pipeline it gives the above error when copying from the build image to the final image.

This post https://community.atlassian.com/t5/Bitbucket-articles/Changes-to-make-your-containers-more-secure-on-Bitbucket/ba-p/998464 implies it has something to do with out of range uid/gid values, however I have checked, and both are 1000, on the source and target.

Is there anything else I can check?

[Graham Benton · Accepted solution]

Switching to using buildkit got around the problem.