{
  lib,
  self,
  inputs,
  ...
}: let
  # function -> function -> { } -> { }
  # wrap the `args` applied to `builder` with the result of `apply`
  # applied to those `args`
  wrapBuilderWith = apply: builder: args: builder (apply args);

  # string -> function -> { } -> { }
  # wrap the `args` for `builder` of type `type` with nice defaults
  wrapBuilder = type:
    wrapBuilderWith ({
        modules ? [],
        specialArgs ? {},
        ...
      } @ args:
        args
        // {
          modules =
            modules
            ++ lib.attrValues (self."${type}Modules" or {});

          specialArgs = specialArgs // {inherit inputs;};
        });

  # function -> { } -> { }
  # wrap the `args` to the nixos `builder` function with nice defaults
  wrapNixOS = builder: args: wrapBuilder "nixos" builder args;
  # function -> { } -> { }
  # wrap the `args` to the darwin `builder` function with nice defaults
  wrapDarwin = builder: args: wrapBuilder "darwin" builder args;

  # function -> { } -> { }
  # wrap the `args` to the homeManager `builder` function with nice defaults
  wrapUser = builder: args:
    wrapBuilderWith ({
        modules ? [],
        extraSpecialArgs ? {},
        ...
      } @ args:
        args
        // {
          modules =
            modules
            ++ lib.attrValues (self.homeManagerModules or {});

          extraSpecialArgs = extraSpecialArgs // {inherit inputs;};
        })
    builder
    args;
in {
  # { } -> { }
  # apply nice defaults to the `args` of `nixosSystem`
  nixosSystem = wrapNixOS inputs.nixpkgs.lib.nixosSystem;
  # { } -> { }
  # apply nice defaults to the `args` of (stable) `nixosSystem`
  nixosSystemStable = wrapNixOS inputs.nixpkgs-stable.lib.nixosSystem;
  # { } -> { }
  # apply nice defaults to the `args` of `darwinSystem`
  darwinSystem = wrapDarwin inputs.nix-darwin.lib.darwinSystem;
  # { } -> { }
  # apply nice defaults to the `args` of `homeManagerConfiguration`
  homeManagerConfiguration = wrapUser inputs.home-manager.lib.homeManagerConfiguration;

  nginx = import ./nginx.nix lib;
}