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

  # This one contains whatever you want to overlay
  # You can change versions, add patches, set compilation flags, anything really.
  # https://nixos.wiki/wiki/Overlays
  modifications = final: prev: {
    # example = prev.example.overrideAttrs (oldAttrs: rec {
    # ...
    # });
    tmuxPlugins =
      prev.tmuxPlugins
      // {
        tokyo-night-tmux = prev.callPackage ../pkgs/tmux-tokyo-night.nix {
          pkgs = prev;
          lib = prev.lib;
        };
      };
    gnome-keyring = prev.gnome.gnome-keyring;
  };

  # When applied, the unstable nixpkgs set (declared in the flake inputs) will
  # be accessible through 'pkgs.unstable'
  unstable-packages = final: _prev: {
    unstable = import inputs.nixpkgs-unstable {
      system = final.system;
      config.allowUnfree = true;
    };
  };
}