This is really cool, but I don’t know if I see the appeal for actual nix users — if you are a nix user and have it set up in CI, you can easily build docker images yourself using buildLayeredImage. And then if you aren’t a nix user, why would you use this? Installing packages with, say, apt, is decidedly not where my pains with docker have arose.
[Here](https://github.com/fdb-rs/fdb/blob/fdb-0.2.2/nix/ci/flake.ni...) is relevant code.