<a href="https://duzi077.tistory.com/198" target="_blank" rel="noopener noreferrer">https://duzi077.tistory.com/198</a>

여기 참고해보세요!
android 루트가 아니라 android/app 안의 파일을 수정해주시면 되는 거 같습니다.

원인은 아마... 파이어베이스 패키지가 커서...??

flutter 재설치 후에

`flutter clean`으로 초기화 해주시고

`flutter doctor`로 체크해보신 뒤 실행해보시겠어요??

Launching lib\main.dart on Android SDK built for x86 in debug mode...

FAILURE: Build failed with an exception.

* What went wrong:
A problem was found with the configuration of task ':app:compileFlutterBuildDebug'.
&gt; Cannot write to file 'D:\Flutter' specified for property 'outputFiles' as it is a directory.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org

BUILD FAILED in 4s
Exception: Gradle task assembleDebug failed with exit code 1
Exited (sigterm)

이런 오류가 나는데 이것도 같은 문제인가요?

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패키지 설치 후 빌드 오류가 난다면