top-level: return __splicedPackages

    _module.args = {

      hostPkgs =

        # Comment is in nixos/modules/misc/nixpkgs.nix

        lib.mkOverride lib.modules.defaultOverridePriority config.hostPkgs.__splicedPackages;

        lib.mkOverride lib.modules.defaultOverridePriority config.hostPkgs;

    };

    driver = withChecks driver;

        # which is somewhat costly for Nixpkgs. With an explicit priority, we only

        # evaluate the wrapper to find out that the priority is lower, and then we

        # don't need to evaluate `finalPkgs`.

        lib.mkOverride lib.modules.defaultOverridePriority finalPkgs.__splicedPackages;

        lib.mkOverride lib.modules.defaultOverridePriority finalPkgs;

    };

    assertions =

      # find mistaken definitions

      builtins.seq cfg.config builtins.seq cfg.overlays builtins.seq cfg.hostPlatform builtins.seq

        cfg.buildPlatform

        cfg.pkgs.__splicedPackages;

        cfg.pkgs;

    nixpkgs.config = cfg.pkgs.config;

    nixpkgs.overlays = cfg.pkgs.overlays;

    nixpkgs.hostPlatform = cfg.pkgs.stdenv.hostPlatform;

        buildPackages.stdenv.cc;

  };

  pkgs = dfold folder postStage (_: { }) withAllowCustomOverrides;

in

dfold folder postStage (_: { }) withAllowCustomOverrides

# Return the spliced package set, so that consumers of the nixpkgs top-level

# attributes, like NixOS, don't break when cross-compiling.

pkgs.__splicedPackages