{
  inputs = {
    nixpkgs = {
      type = "github";
      owner = "NixOS";
      repo = "nixpkgs";
      ref = "nixos-25.05";
    };
  };

  outputs = { self, nixpkgs }:
  let supportedSystems = [ "aarch64-linux" "x86_64-linux" ];
      forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
      nixpkgsFor = forAllSystems (system: import nixpkgs { inherit system; });
  in {
    packages = forAllSystems (system: let pkgs = nixpkgsFor.${system}; in rec {
      default = pollyana;

      pollyana = pkgs.python3Packages.buildPythonPackage rec {
        pname = "pollyana";
        version = "0.1";

        src = ./src;

        nativeBuildInputs = with pkgs; [
          gobject-introspection
          wrapGAppsHook4
        ];

        propagatedBuildInputs = (with pkgs; [
          gtk3
          pocketsphinx.lib
        ]) ++ (with pkgs.gst_all_1; [
          gstreamer
          gst-plugins-base
          gst-plugins-good
        ]) ++ (with pkgs.python3Packages; [
          more-itertools
          requests
          pygobject3
        ]);
      };

      kaylee = pkgs.python3Packages.buildPythonPackage rec {
        pname = "KayleeVC";
        version = "0.1.1";

        src = pkgs.fetchFromGitHub {
          owner = "Ratfink";
          repo = "kaylee";
          rev = "baeb0e1fa08fb6b21e4a22458de16b4948d1f2d0";
          hash = "sha256-ghZnmdtXme0g+nsi/dSGxQ6UqGB48lUhYaTSLF94KIo=";
        };

        patches = [
          ./packages/kaylee-data-location.patch
        ];

        nativeBuildInputs = with pkgs; [
          gobject-introspection
          wrapGAppsHook4
        ];

        propagatedBuildInputs = (with pkgs; [
          gtk3
          pocketsphinx.lib
        ]) ++ (with pkgs.gst_all_1; [
          gstreamer
          gst-plugins-base
          gst-plugins-good
        ]) ++ (with pkgs.python3Packages; [
          requests
          pygobject3
        ]);
      };
    });

    devShells = forAllSystems (system: let pkgs = nixpkgsFor.${system}; in {
      default = pkgs.mkShell {
        nativeBuildInputs = with pkgs; [
        ];
      };
    });
  };
}