{inputs, ...}: {
  # This one brings our custom packages from the `pkgs` directory
  additions = final: _prev: import ../pkgs final.pkgs;

  # Any custom modifications
  # https://nixos.wiki/wiki/Overlays
  modifications = final: prev: {
    # example = prev.example.overrideAttrs (oldAttrs: rec {
    # ...
    # });
  };
}