I don't think it fits the tutorials you're creating on nix.dev, but I would love a deep dive how to use module system that nixpkgs provides. What I mean is how

I don't think it fits the tutorials you're creating on nix.dev, but I would love a deep dive how to use module system that nixpkgs provides. What I mean is how to use it to create my own solution. For example if I would create own configuration file like flake.nix or configuration.nix how could I process it. I think I figured it out, but I'm still not certain if I'm using it correctly.