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{
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-21.11";

    home-manager = {
      # "/release-21.11" para stable
      url = "github:nix-community/home-manager";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    nur.url = "github:nix-community/NUR";
  };

  outputs = { self, nixpkgs, home-manager, nur, ... }: let
    pkgs = import nixpkgs {
      system = "x86_64-linux";
      config = import ./nixpkgs.nix;
    };
  in with pkgs.lib; let
    util = import ./util;
    inherit (util pkgs.lib) importAll;

    pkgSet = pkgs: import ./pkgs {
      inherit pkgs;
      util = util pkgs.lib;
    };
  in {
    packages."x86_64-linux" = pkgSet pkgs;

    overlay = self: super: {
      local = pkgSet super;
    };

    nixosConfigurations = with pkgs.lib; let
      hostConfig = host: (makeOverridable nixosSystem) {
        system = "x86_64-linux";
        modules = [ (import ./sys self) host ];
      };
    in mapAttrs (_: hostConfig) (importAll { root = ./sys/platform; });

    homeConfigurations = let
      home = platform: home-manager.lib.homeManagerConfiguration {
        system = "x86_64-linux";

        configuration = import ./home;
        extraModules = [ platform ];

        username = "ale";
        homeDirectory = "/home/ale";

        # Update the state version as needed.
        # See the changelog here:
        # https://nix-community.github.io/home-manager/release-notes.html#sec-release-21.05
        stateVersion = "21.11";

        # Optionally use extraSpecialArgs
        # to pass through arguments to home.nix
        extraSpecialArgs = {
          inherit nur self;
        };
      };

      homeConfig = id: platform: {
        name = "ale@${id}";
        value = home platform;
      };
    in mapAttrs' homeConfig (importAll { root = ./home/platform; });
  };
}