I have this simple workflow to build a Flutter app, but it is failing to create a file at the home /github/home/ folder.

Run flutter pub get
FileSystemException: Cannot create file, path = '/github/home/.flutter' (OS Error: Permission denied, errno = 13)

#0 _File.throwIfError (dart:io/file_impl.dart:643:7)

#1 _File.createSync (dart:io/file_impl.dart:281:5)

I attached the container initialization log and it is possible to see that the docker image has the home volume mapped to it.

name: Dart CI
on: [push]
jobs:

build:
runs-on: ubuntu-latest

container:
  image: cirrusci/flutter:v1.7.8-hotfix.4

steps:
- uses: actions/checkout@v1
- name: Install dependencies
  run: flutter pub get
  working-directory: my_app
- name: Run tests
  run: flutter test
  working-directory: my_app

Here are the logs for this action.

https://github.com/actions/docker/files/3587247/initialize-containers.log

https://github.com/actions/docker/files/3587248/install-dependencies.log