{
  description = "Noctalia shell conf";

  inputs = {
    # Main tree
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";

    # Noctalia v5
    noctalia.url = "github:noctalia-dev/noctalia";
    noctalia-greeter = {
      url = "github:noctalia-dev/noctalia-greeter";
      inputs.nixpkgs.follows = "nixpkgs";
    };

  };

  outputs = { self, nixpkgs, noctalia, ... }@inputs: {
    nixosConfigurations.opus = nixpkgs.lib.nixosSystem {
      system = "x86_64-linux";
      specialArgs = { inherit inputs; }; 
      modules = [
        ./configuration.nix
      ];
    };
  };
}