Usually Podman is drop in replacement for docker however using Podman to build VyOS results in a stalled process due to prompt after 'opam init' not being answered:

Do you want opam to modify ~/.profile? [N/y/f]

Checked building with docker and this prompt is automatically answered with default "n" in that scenario. Opam init supports the flag -n/--no-setup per man page which achieves the same result.