Generic way to build the first stage

[nalind]

Discussed in containers/buildah#5263

^{Originally posted by vonbox January 11, 2024}
With buildah bud --target=layer0 . I can build the first stage of a multistage containerfile. Is there a way to specify the first layer without me needing to name it, or without needing to know the name? Something like buildah bud --target=0 .?
I am trying to create a kinda generic script that should be able to build the first stage of any containerfile.