{
  description = "photogallery uploader — Qt6 C++ desktop app";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, flake-utils }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs { inherit system; };

        qtPlugins = pkgs.lib.makeSearchPathOutput "out" "lib/qt-6/plugins" [
          pkgs.qt6.qtbase
          pkgs.qt6.qtwayland
          pkgs.qt6.qtimageformats
        ];
      in {
        devShells.default = pkgs.mkShell {
          packages = with pkgs; [
            cmake
            ninja
            pkg-config
            qt6.qtbase
            qt6.qtwayland       # native Wayland QPA plugin
            qt6.qtimageformats  # HEIF/HEIC + others, read by QImage
            qt6Packages.qtkeychain # password → libsecret / kwallet
          ];

          shellHook = ''
            # Let a binary run straight from the build dir find Qt's platform
            # (xcb + wayland) and image-format plugins without wrapQtAppsHook.
            export QT_PLUGIN_PATH="${qtPlugins}''${QT_PLUGIN_PATH:+:$QT_PLUGIN_PATH}"
          '';
        };
      });
}