nixpkgs/nixos/modules/programs/wayland/lib.nix

{ lib }:

{
  genFinalPackage =
    pkg: args:
    let
      expectedArgs = with lib; lib.naturalSort (lib.attrNames args);
      existingArgs =
        with lib;
        naturalSort (intersectLists expectedArgs (attrNames (functionArgs pkg.override)));
    in
    if existingArgs != expectedArgs then pkg else pkg.override args;
}