Kotlin Gradle Plugin usage prevents Built-in Kotlin compatibility in Flutter

[Tanish2709]

Operating System

window 11

Plugin

share_plus

Version

13.1.0

Flutter SDK

3.44.1

Compilation command

WARNING: Your app uses the following plugins that apply Kotlin Gradle Plugin (KGP): firebase_storage, share_plus
Future versions of Flutter will fail to build if your app uses plugins that apply KGP.

Please check the changelogs of these plugins and upgrade to a version that supports Built-in Kotlin.
If no such version exists, report the issue to the plugin. If necessary, here is a guide on filing
an issue against a plugin: https://docs.flutter.dev/release/breaking-changes/migrate-to-built-in-kotlin/for-app-developers#report-incompatible-kotlin-gradle-plugin-usage-to-plugin-authors

If you are a plugin author, please migrate your plugin to Built-in Kotlin using this guide: https://docs.flutter.dev/release/breaking-changes/migrate-to-built-in-kotlin/for-plugin-authors

Dart Dependencies

name: helloworld
description: "A new Flutter project."
# The following line prevents the package from being accidentally published to
# pub.dev using `flutter pub publish`. This is preferred for private packages.
publish_to: 'none' # Remove this line if you wish to publish to pub.dev

# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a +.
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# In Android, build-name is used as versionName while build-number used as versionCode.
# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
# In iOS, build-name is used as CFBundleShortVersionString while build-number is used as CFBundleVersion.
# Read more about iOS versioning at
# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
# In Windows, build-name is used as the major, minor, and patch parts
# of the product and file versions while build-number is used as the build suffix.
version: 1.0.0+1
assets:
    - assets/catalog/

environment:
  sdk: ^3.10.4

# Dependencies specify other packages that your package needs in order to work.
# To automatically upgrade your package dependencies to the latest versions
# consider running `flutter pub upgrade --major-versions`. Alternatively,
# dependencies can be manually updated by changing the version numbers below to
# the latest version available on pub.dev. To see which dependencies have newer
# versions available, run `flutter pub outdated`.
dependencies:
  flutter:
    sdk: flutter
  cupertino_icons: ^1.0.8
  flutter_svg: ^2.2.3
  image_picker: ^1.0.7
  shared_preferences: ^2.2.2
  uuid: ^4.5.2
  intl: ^0.20.2
  pdf: ^3.10.7
  printing: ^5.14.2
  webview_flutter: ^4.7.0
  firebase_core: ^4.3.0
  firebase_auth: ^6.1.3
  cloud_firestore: ^6.1.1
  firebase_storage: ^13.4.2
  share_plus: ^13.1.0
  path_provider: ^2.1.5
  
  
  async: ^2.11.0
  
flutter_icons:
  android: true
  ios: true
  image_path: "assets/icon/icon.png"
  adaptive_icon_background: "#00000000"
  adaptive_icon_foreground: "assets/icon/icon.png"

  min_sdk_android: 21

dev_dependencies:
  flutter_test:
    sdk: flutter
  flutter_lints: ^6.0.0
  flutter_launcher_icons: ^0.14.4

# For information on the generic Dart part of this file, see the
# following page: https://dart.dev/tools/pub/pubspec

# The following section is specific to Flutter packages.
flutter:
  uses-material-design: true

  
  # To add assets to your application, add an assets section, like this:
  # assets:
  #   - images/a_dot_burr.jpeg
  #   - images/a_dot_ham.jpeg

  # An image asset can refer to one or more resolution-specific "variants", see
  # https://flutter.dev/to/resolution-aware-images

  # For details regarding adding assets from package dependencies, see
  # https://flutter.dev/to/asset-from-package

  # To add custom fonts to your application, add a fonts section here,
  # in this "flutter" section. Each entry in this list should have a
  # "family" key with the font family name, and a "fonts" key with a
  # list giving the asset and other descriptors for the font. For
  # example:
  #fonts:
  #   - family: American Captain
  #     fonts:
  #        - asset: fonts/AmericanCaptain-Regular.ttf
  #          weight: 400
  #        - asset: fonts/AmericanCaptain-Bold.ttf
  #          weight: 700
  #     
  #   - family: leaguespartan-bold
  #     fonts:
  #       - asset: fonts/LeagueSpartan-Bold.ttf
  #         weight: 700
  #
  # For details regarding fonts from package dependencies,
  # see https://flutter.dev/to/font-from-package

Native dependencies

Compilation Error

WARNING: Your app uses the following plugins that apply Kotlin Gradle Plugin (KGP): firebase_storage, share_plus
Future versions of Flutter will fail to build if your app uses plugins that apply KGP.

Please check the changelogs of these plugins and upgrade to a version that supports Built-in Kotlin.
If no such version exists, report the issue to the plugin. If necessary, here is a guide on filing 
an issue against a plugin: https://docs.flutter.dev/release/breaking-changes/migrate-to-built-in-kotlin/for-app-developers#report-incompatible-kotlin-gradle-plugin-usage-to-plugin-authors

If you are a plugin author, please migrate your plugin to Built-in Kotlin using this guide: https://docs.flutter.dev/release/breaking-changes/migrate-to-built-in-kotlin/for-plugin-authors

Flutter Doctor

[√] Flutter (Channel stable, 3.44.1, on Microsoft Windows [Version 10.0.26200.8457], locale
    en-IN) [515ms]
    • Flutter version 3.44.1 on channel stable at C:\Tanish_code\Flutter_sdk\flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 924134a44c (9 days ago), 2026-05-29 12:13:22 -0400
    • Engine revision c416acfeb8
    • Dart version 3.12.1
    • DevTools version 2.57.0
    • Feature flags: enable-web, enable-linux-desktop, enable-macos-desktop,
      enable-windows-desktop, enable-android, enable-ios, cli-animations,
      enable-native-assets, enable-swift-package-manager, omit-legacy-version-file,
      enable-lldb-debugging, enable-uiscene-migration

[√] Windows Version (Windows 11 or higher, 25H2, 2009) [2.3s]

[√] Android toolchain - develop for Android devices (Android SDK version 36.1.0) [25.2s]
    • Android SDK at C:\Users\tanis\AppData\Local\Android\sdk
    • Emulator version 36.3.10.0 (build_id 14472402) (CL:N/A)
    • Platform android-36, build-tools 36.1.0
    • Java binary at: C:\Tanish_code\Android\jbr\bin\java
      This is the JDK bundled with the latest Android Studio installation on this machine.
      To manually set the JDK path, use: `flutter config --jdk-dir="path/to/jdk"`.
    • Java version OpenJDK Runtime Environment (build 21.0.8+-14196175-b1038.72)
    • All Android licenses accepted.

[√] Chrome - develop for the web [34ms]
    • Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe

[X] Visual Studio - develop Windows apps [31ms]
    X Visual Studio not installed; this is necessary to develop Windows apps.
      Download at https://visualstudio.microsoft.com/downloads/.
      Please install the "Desktop development with C++" workload, including all of its
      default components

[√] Connected device (4 available) [1,400ms]
    • sdk gphone64 x86 64 (mobile) • emulator-5554 • android-x64    • Android 16 (API 36)
      (emulator)
    • Windows (desktop)            • windows       • windows-x64    • Microsoft Windows
      [Version 10.0.26200.8457]
    • Chrome (web)                 • chrome        • web-javascript • Google Chrome
      148.0.7778.217
    • Edge (web)                   • edge          • web-javascript • Microsoft Edge
      148.0.3967.96

[√] Network resources [1,722ms]
    • All expected network resources are available.

! Doctor found issues in 1 category.

Checklist before submitting a bug

• I searched issues in this repository and couldn't find such bug/problem
• I Google'd a solution and I couldn't find it
• I searched on StackOverflow for a solution and I couldn't find it
• I read the README.md file of the plugin
• I'm using the latest version of the plugin
• All dependencies are up to date with flutter pub upgrade
• I did a flutter clean
• I tried running the example project