This is definitely an option. But isn't colmena just a nice wrapper on top of the same things nixos-rebuild uses (nix-build, nix-copy, etc) plus some nice-to-ha

This is definitely an option. But isn't colmena just a nice wrapper on top of the same things nixos-rebuild uses (nix-build, nix-copy, etc) plus some nice-to-haves for easier eval REPL? I mean, yes, I suppose I can use `nixos-rebuild --fast --build-host foo --target-host foo --flake ".#foo" switch` and maybe even wrap that in a the flake itself (`flake run .#deploy-foo`), but why should I reinvent this wheel, if I can just `colmena apply --on foo` and let it do what I mean? I definitely will consider nixos-rebuild if colmena won't support something I want. Just like I'm currently considering trying out colmena because deploy-rs can't do `activate test` and messes up `/boot/loader/loader.conf`, which I don't fancy as I want to eventually have a "one-shot reboot into a new generation and if something fails too badly, watchdog will eventually panic (or I'll ask someone to cycle the power) and reboot back to a good generation" ultimate magic rollback. Worst that would happen is that I'll learn a new tool (aka learn what it can't do for me) and won't use it. No cloud infra here, all bare metal and one tiny auxiliary VPS.