{
  description = "nixos-config";

  inputs = {
    nixpkgs = { url = "github:nixos/nixpkgs/nixos-unstable"; };
    stable = { url = "github:nixos/nixpkgs/nixos-20.09"; };
    hardware = { url = "github:nixos/nixos-hardware"; };
    home-manager = { url = "github:nix-community/home-manager"; };
    nixpkgs-wayland = { url = "github:colemickens/nixpkgs-wayland"; };
    nur = { url = "github:nix-community/NUR"; };
  };

  outputs = inputs:
    let
      nixFilesIn = dir:
        builtins.mapAttrs (name: _: name) (builtins.readDir dir);
      hostFiles = dir: builtins.attrValues (nixFilesIn (./. + (dir)));

      mkSystem =
        { sys ? "x86_64-linux", pkgs ? inputs.nixpkgs, modules, hostname }:
        pkgs.lib.nixosSystem {
          system = sys;
          modules = modules;
          specialArgs = { inherit inputs; };
        };
      mkHost = name:
        let
          hostDir = "/hosts/${name}";
          mod = (builtins.map (file: (./. + "${hostDir}/${file}"))
            (builtins.attrValues (nixFilesIn (./. + "${hostDir}")))) ++ [{
              nixpkgs.overlays =
                [ inputs.nur.overlay (import ./pkgs/pkgs.nix) ];
            }];
        in mkSystem {
          hostname = name;
          modules = mod;
        };
    in {
      nixosConfigurations =
        builtins.mapAttrs (name: _: mkHost name) (builtins.readDir ./hosts);
    };
}