How to define --podman-build-args in compose.yaml?

I can do `podman-compose --podman-build-args "--runtime krun"` in command-line and it successfully uses crun-krun as the runtime *during build* (this is important, I specifically want to run all the build steps within microVM via krunlib). However, I couldn't find a way to achieve the same by adding something to my compose.yaml and just using `podman-compose build` command. Is this even possible? There's very little info I could find on how --podman-build-args works in general. Thanks!