(nerdctl|docker) build: createdAt discrepancy

[apostasie]

Description

When a Dockerfile is basically a no-op on top of an existing image (eg: no new layer), docker will report the createAt data as the same as the base image, while nerdctl will report the createdAt date as the current time.

No idea which one is right.

Steps to reproduce the issue

Dockerfile

FROM ubuntu:22.04
LABEL org.opencontainers.image.source=https://github.com/foo/bar

docker build -t foofoo .
docker images foofoo

REPOSITORY   TAG       IMAGE ID       CREATED       SIZE
foofoo       latest    0e176124cabe   2 weeks ago   69.2MB

nerdctl build -t foofoo .
nerdctl images foofoo

REPOSITORY    TAG       IMAGE ID        CREATED          PLATFORM       SIZE       BLOB SIZE
foofoo        latest    a37803d1ecd0    3 seconds ago    linux/arm64    78.98MB    27.36MB

Describe the results you received and expected

Same with both?

What version of nerdctl are you using?

main

Are you using a variant of nerdctl? (e.g., Rancher Desktop)

None

Host information

No response