In this talk we\u2019ll discuss antlir2, Meta\u2019s solution to building container and bare metal operating system images. We\u2019ll talk about how we have built performant, hermetic and deterministic image building infrastructure on top of buck2 (Meta\u2019s new open source build system) and how we enable users to compose their own multi-language projects with full operating systems, write tests and deploy their images. Along the way, we\u2019ll also cover how antlir2 wrangles dnf and other upstream tooling to behave more predictably for better, more reliable images.\nabout this event: https://cfp.all-systems-go.io/all-systems-go-2023/talk/9E9MLC/