I am building an image for lambda and pushing it to ECR.

I am using GitHub actions and docker/build-push-action.

I am specifying both the platform and the provenance: false

- name: build and push the image
  uses: docker/build-push-action@v5
  with:
    provenance: false
    platform: linux/arm64
    push: true
    tags: something

I am able to select the image to be deployed and arm64 as platform.

However the lambda fails with

exec format error Runtime.InvalidEntrypoint

What am I missing?