{...}: {
  additions = final: _prev: import ../.old/pkgs {pkgs = final;};
  rice = import ./rice.nix;
  # pkg-sets = final: prev: {
  #   unstable = import inputs.nixpkgs {
  #     system = final.system;
  #     config.allowUnfree = true;
  #   };
  #   stable = import inputs.nixpkgs-stable {
  #     system = final.system;
  #     config.allowUnfree = true;
  #   };
  # };
}