{
  inputs = {
    nixos-hardware.url = "github:NixOS/nixos-hardware";
    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.11";
    nur.url = "github:nix-community/NUR";

    agenix = {
      url = "github:ryantm/agenix";
      inputs = {
        home-manager.follows = "home-manager";
        nixpkgs.follows = "nixpkgs";
      };
    };

    home-manager = {
      url = "github:nix-community/home-manager/release-23.11";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    nix-index-database = {
      url = "github:Mic92/nix-index-database";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    website = {
      url = "github:buffet/website";
      flake = false;
    };
  };

  outputs = {
    nixpkgs,
    nixpkgs-unstable,
    ...
  } @ args: let
    makeSystem = system: config:
      nixpkgs.lib.nixosSystem {
        inherit system;
        specialArgs = args;
        modules = let
          overlay-unstable = final: prev: {
            unstable = nixpkgs-unstable.legacyPackages.${prev.system};
          };
        in [
          config
          (_: {nixpkgs.overlays = [(import ./overlay args) overlay-unstable];})
        ];
      };
  in {
    nixosConfigurations = {
      alice = makeSystem "x86_64-linux" ./hosts/alice;
      tara = makeSystem "x86_64-linux" ./hosts/tara;
    };
  };
}