I did not need to work with this use case, but from what i understand about it, you configure cron in nixos in a declarative way and nix configures cron[0], but

I did not need to work with this use case, but from what i understand about it, you configure cron in nixos in a declarative way and nix configures cron[0], but you will most likely see no issues with scripting it anyway, there's a whole language and it can interop with other languages [0] https://nixos.wiki/wiki/Cron https://nixos.wiki/wiki/Cron