Docker Buildx
Docker Buildx found an undefined build argument in FROM
UndefinedArgInFrom
Docker Buildx build checks found a Dockerfile FROM instruction that references a build argument that is not defined.
Error AtlasError Documentation and ResolutionObserved message
UndefinedArgInFrom
Why it happens
- A FROM instruction references a build argument that was never declared.
- The ARG declaration appears after the first place it is used.
- A renamed build argument was not updated everywhere in the Dockerfile.
How to fix it
- Declare the build argument with ARG before the FROM instruction that uses it.
- Check for typos or renamed variables in the image reference.
- Run the build again after aligning the ARG names and ordering.
Official reference
Docker Docs: Build checksRelated errors
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