Product flavors on Windows and Linux in Flutter 3.47

Dev/staging/prod builds were a mobile-only story for a long time. Flutter 3.47 brings flavors to Windows and Linux.

pubspec assets per flavor

flutter:
  assets:
    - path: assets/flavor_a/images
      flavors:
        - flavor_a
    - path: assets/flavor_b/images
      flavors:
        - flavor_b

Build

flutter build windows --flavor flavor_a
flutter build linux --flavor flavor_a

Why desktop teams care

• Separate app IDs and icons for internal vs store builds.
• Different API base URLs without string hacks in Dart.
• CI matrix can produce side-by-side installers.

Pitfalls

• Pair flavors with dart-define or compile-time env — flavors alone do not inject secrets.
• Remember desktop packaging (MSIX, deb/rpm, AppImage) still has its own identity rules.