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

  # 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:
  # Import all package modifications from mods directory
    (import ./mods/default.nix {inherit prev;})
    // {
      # Direct configuration overrides
      brave = prev.brave.override {
        commandLineArgs = "--password-store=gnome-libsecret";
      };
    };

  master-packages = final: _prev: {
    master = import inputs.nixpkgs-master {
      system = final.stdenv.hostPlatform.system;
      config.allowUnfree = true;
    };
  };
}