diff --git a/desktop/flake.nix b/desktop/flake.nix
index 7e9b1f3..9d975bd 100644
--- a/desktop/flake.nix
+++ b/desktop/flake.nix
@@ -10,18 +10,20 @@
     flake-utils.lib.eachDefaultSystem (system:
       let
         pkgs = import nixpkgs { inherit system; };
+        inherit (pkgs) lib stdenv;
 
-        qtPlugins = pkgs.lib.makeSearchPathOutput "out" "lib/qt-6/plugins" [
-          pkgs.qt6.qtbase
-          pkgs.qt6.qtwayland
-          pkgs.qt6.qtimageformats
-        ];
+        # Wayland is Linux-only; macOS uses the Cocoa QPA plugin inside qtbase,
+        # so qtwayland is added only on Linux (it refuses to evaluate on darwin).
+        qtModules = [ pkgs.qt6.qtbase pkgs.qt6.qtimageformats ]
+          ++ lib.optionals stdenv.hostPlatform.isLinux [ pkgs.qt6.qtwayland ];
+
+        qtPlugins = lib.makeSearchPathOutput "out" "lib/qt-6/plugins" qtModules;
       in {
         # Installable build: `nix profile install ./desktop` drops "Photog" into
         # the application menu with its icon. wrapQtAppsHook wraps the binary so
-        # it finds the Qt platform (xcb + wayland) and image-format plugins on
-        # its own, without the dev shell.
-        packages.default = pkgs.stdenv.mkDerivation {
+        # it finds the Qt platform (Cocoa on macOS; xcb + wayland on Linux) and
+        # image-format plugins on its own, without the dev shell.
+        packages.default = stdenv.mkDerivation {
           pname = "photog";
           version = "0.1.0";
           src = ./.;
@@ -31,12 +33,7 @@
             pkg-config
             qt6.wrapQtAppsHook
           ];
-          buildInputs = with pkgs; [
-            qt6.qtbase
-            qt6.qtwayland
-            qt6.qtimageformats
-            qt6Packages.qtkeychain
-          ];
+          buildInputs = [ pkgs.qt6Packages.qtkeychain ] ++ qtModules;
         };
 
         devShells.default = pkgs.mkShell {
@@ -44,15 +41,12 @@
             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
-          ];
+            qt6Packages.qtkeychain # password → Keychain (macOS) / libsecret / kwallet
+          ] ++ qtModules;
 
           shellHook = ''
-            # Let a binary run straight from the build dir find Qt's platform
-            # (xcb + wayland) and image-format plugins without wrapQtAppsHook.
+            # Let a binary run straight from the build dir find Qt's platform and
+            # image-format plugins without wrapQtAppsHook.
             export QT_PLUGIN_PATH="${qtPlugins}''${QT_PLUGIN_PATH:+:$QT_PLUGIN_PATH}"
           '';
         };