Pass specialArgs to the home-manager module

Use extraSpecialArgs instead of specialArgs

forAllUser (name: home-manager.lib.homeManagerConfiguration {

  pkgs = (nixpkgs.legacyPackages.${system}.extend (import ./overlays/default.nix));

  # Specify your home configuration modules here, for example,
  # the path to your home.nix.

  modules = [ ./home-module.nix ];

  # Optionally use extraSpecialArgs
  # to pass through arguments to home.nix

  extraSpecialArgs = {
    userConfig = {
      home = "/home/${name}";
      inherit name;
      inherit system;
    };
  };

})