I’m facing an issue with my Flutter Android build on CircleCI where it fails with the following error:

Execution failed for task ':app:androidDependencies'.
> Could not resolve all artifacts for configuration ':app:prodDebugCompileClasspath'.
   > Could not find com.google.android:flexbox:2.0.1.
     Required by:
         project :app

Here’s the relevant part of my android/app/build.gradle:

android {
    ...
    flavorDimensions "default"

    productFlavors {
        staging {
            dimension "default"
            applicationIdSuffix ".staging"
            manifestPlaceholders = [appName: "App Staging", isStaging: true, isProduction: false]
        }
        prod {
            dimension "default"
            applicationIdSuffix ""
            manifestPlaceholders = [appName: "App", isStaging: false, isProduction: true]
        }
    }
}

flutter {
    source '../..'
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.9.0"
    implementation 'com.google.firebase:firebase-messaging:21.0.0'
    implementation 'com.polidea.rxandroidble2:rxandroidble:1.11.1'
    implementation "com.google.android.material:material:1.5.0"
    implementation 'androidx.window:window:1.0.0'
    implementation 'androidx.window:window-java:1.0.0'
    implementation 'com.android.support:multidex:1.0.3'
    implementation 'com.google.android:flexbox:2.0.1' // added this to implementation
    coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:1.2.2'
}

and I’ve also tried to add a combination on these in android/build.gradle

allprojects {
    repositories {
        google()
        mavenCentral()
        maven { url 'https://jitpack.io' }
        maven { url 'https://maven.google.com' }
        jcenter() // Note: jcenter is deprecated but can still be used for legacy dependencies
    }
}

Where I’ve added mavenCentral() and maven { url 'https://maven.google.com' } but nothing works there.

Context:

• I am using a Zoom SDK bridge in my Flutter app. (version 5.16.6)
• The error occurs during the CircleCI build process but not on local builds.
• Running ./gradlew clean build --refresh-dependencies doesn’t seem to work.

my CircleCI config:

version: "2.1"
orbs:
  flutter: circleci/[email protected]
  android: circleci/[email protected]
  macos: circleci/[email protected]

parameters:
  manual-staging-run:
    type: boolean
    default: false

workflows:
  build:
    jobs:
      - lint_and_test:
          filters:
            branches:
              ignore:
                - staging
                - main
  deploy_staging:
    jobs:
      - lint_and_test:
          filters:
            branches:
              only: staging
      - deploy_staging_ios:
          requires:
            - lint_and_test
      - deploy_staging_android:
          requires:
            - lint_and_test
  deploy_prod:
    jobs:
      - lint_and_test:
          filters:
            branches:
              only: main
      - deploy_prod_ios:
          requires:
            - lint_and_test
      - deploy_prod_android:
          requires:
            - lint_and_test
  manual_deploy_staging:
    when: << pipeline.parameters.manual-staging-run >>
    jobs:
      - lint_and_test
      - deploy_staging_ios:
          requires:
            - lint_and_test
      - deploy_staging_android:
          requires:
            - lint_and_test

commands:
  setup_env:
    steps:
      - checkout
      - flutter/install_sdk_and_pub:
          version: 3.19.5
      - run:
          name: Install Zoom SDK
          command: flutter pub run zoom:unzip_zoom_sdk
  run_fastlane:
    parameters:
      fastlane_lane:
        default: "staging_release"
        type: string
      platform:
        default: ""
        type: string
    steps:
      - run:
          no_output_timeout: 50m
          name: Fastlane
          command: bundle exec fastlane <<parameters.fastlane_lane>> build_number:$CIRCLE_BUILD_NUM
          working_directory: <<parameters.platform>>
  build_ios:
    parameters:
      fastlane_lane:
        default: "staging_release"
        type: string
      output_dir:
        default: output
        type: string
    steps:
      - setup_env
      - flutter/install_ios_pod
      - flutter/install_ios_gem:
          cache-version: v1.1
      - run: echo "$APP_STORE_API_KEY_JSON" | base64 --decode > ios/key_file.json
      - run_fastlane:
          fastlane_lane: <<parameters.fastlane_lane>>
          platform: ios
      - store_artifacts:
          path: <<parameters.output_dir>>
          destination: outputs
  build_android:
    parameters:
      flavor:
        default: staging
        type: string
      output_dir:
        default: output
        type: string
    steps:
      - setup_env
      - flutter/install_android_gradle_dependencies
      - flutter/install_android_gem
      - run: echo "$PLAY_STORE_UPLOAD_KEY" | base64 --decode > android/app-keystore
      - run: echo "$PLAY_STORE_UPLOAD_KEY_INFO" | base64 --decode > android/key.properties
      - run: echo "$SUPPLY_JSON_KEY_DATA" > android/play-store-credentials.json
      - run_fastlane:
          fastlane_lane: <<parameters.flavor>>_release
          platform: android
      # - run_fastlane:
      #      fastlane_lane: <<parameters.flavor>>_apk
      #      platform: android
      - store_artifacts:
          path: <<parameters.output_dir>>
          destination: outputs

jobs:
  deploy_staging_android:
    description: Deploy Staging build to internal testers in Play Store
    executor:
      name: android/android-machine
      tag: 2024.01.1
    steps:
      - build_android:
          flavor: staging
          output_dir: android/build/app/outputs/flutter-apk/app-staging-release.apk

  deploy_prod_android:
    description: Deploy Prod build to internal testers in Play Store
    executor:
      name: android/android-machine
      tag: 2024.01.1
    steps:
      - build_android:
          flavor: prod
          output_dir: android/build/app/outputs/flutter-apk/app-prod-release.apk

  deploy_staging_ios:
    description: Deploy Staging build to TestFlight
    macos:
      xcode: 15.3.0
    resource_class: macos.m1.medium.gen1
    environment:
      HOMEBREW_NO_AUTO_UPDATE: 1
    steps:
      - run: brew install graphicsmagick
      - run:
          command: |
            #!/usr/bin/env bash
            if [ "$(uname -m)" = "arm64" ]; then
                /usr/sbin/softwareupdate --install-rosetta --agree-to-license
            else
                echo "Rosetta 2 can only be installed on Apple Silicon!"
                exit 1
            fi
          name: Installing Rosetta 2

      - build_ios:
          fastlane_lane: staging_release

  deploy_prod_ios:
    description: Deploy Prod build to TestFlight
    macos:
      xcode: 15.3.0
    resource_class: macos.m1.medium.gen1
    steps:
      - run:
          command: |
            #!/usr/bin/env bash
            if [ "$(uname -m)" = "arm64" ]; then
                /usr/sbin/softwareupdate --install-rosetta --agree-to-license
            else
                echo "Rosetta 2 can only be installed on Apple Silicon!"
                exit 1
            fi
      - build_ios:
          fastlane_lane: pre_release

  lint_and_test:
    description: Run flutter analyze and Unit Tests
    docker:
      - image: "ghcr.io/cirruslabs/flutter:3.19.5"
    steps:
      - checkout
      - flutter/install_pub
      - run: echo 'export PATH="$PATH":"$HOME/.pub-cache/bin"' >> $BASH_ENV
      - run:
          name: Install junitreport
          shell: "/bin/bash --login -eo pipefail"
          command: dart pub global activate junitreport
      - run: mkdir test-results
      - run:
          name: Run flutter analysis
          command: flutter analyze
      - run:
          name: Run Unit Test
          command: flutter test --machine | tojunit -o test-results/unit-test-report.xml
      - store_test_results:
          path: test-results

How can I resolve the Could not find com.google.android:flexbox:2.0.1 error in my CircleCI build process? Are there any additional steps I should take to ensure that the dependencies are correctly resolved in the CI environment?