{
  description = "att_browser - a minimal, qutebrowser-like QtWebEngine browser";

  inputs = {
    # Pinned to the current NixOS stable release.
    nixpkgs.url = "github:NixOS/nixpkgs";
  };

  outputs = { self, nixpkgs }:
    let
      systems = [ "x86_64-linux" "aarch64-linux" ];
      forAllSystems = f:
        nixpkgs.lib.genAttrs systems (system: f nixpkgs.legacyPackages.${system});
    in
    {
      packages = forAllSystems (pkgs: rec {
        att_browser = pkgs.callPackage ./package.nix { };
        default = att_browser;
      });

      apps = forAllSystems (pkgs: rec {
        att_browser = {
          type = "app";
          program = "${self.packages.${pkgs.stdenv.hostPlatform.system}.att_browser}/bin/att_browser";
        };
        default = att_browser;
      });

      devShells = forAllSystems (pkgs: {
        default = pkgs.mkShell {
          inputsFrom = [ self.packages.${pkgs.stdenv.hostPlatform.system}.att_browser ];

          packages = with pkgs; [
            clang-tools
            gdb
          ];

          # wrapQtAppsHook only wraps installed binaries, so a binary run straight
          # out of ./build has no idea where Qt's plugins live. Export the same
          # variables the wrapper would have set.
          shellHook = with pkgs.qt6; ''
            export QT_PLUGIN_PATH="${qtbase}/${qtbase.qtPluginPrefix}:${qtwebengine}/${qtbase.qtPluginPrefix}"
            export QML2_IMPORT_PATH="${qtdeclarative}/${qtbase.qtQmlPrefix}:${qtwebengine}/${qtbase.qtQmlPrefix}"
            export QTWEBENGINEPROCESS_PATH="${qtwebengine}/libexec/QtWebEngineProcess"
            echo "att_browser dev shell - cmake -B build -G Ninja && cmake --build build && ./build/att_browser"
          '';
        };
      });

      formatter = forAllSystems (pkgs: pkgs.nixpkgs-fmt);
    };
}