anchor.diff:          "platforms;android-17" \
           "platforms;android-16" > /dev/null
   
  -RUN echo "Installing platform tools" && \
  +RUN echo "platform tools" && \
       yes | "$ANDROID_HOME"/tools/bin/sdkmanager \
           "platform-tools" > /dev/null
   
  -RUN echo "Installing build tools 24-30" && \
  +RUN echo "build tools 24-30" && \
       yes | "$ANDROID_HOME"/tools/bin/sdkmanager \
           "build-tools;30.0.0" \
           "build-tools;29.0.3" "build-tools;29.0.2" \
  
positive.code:         "add-ons;addon-google_apis-google-17" \
          "add-ons;addon-google_apis-google-16" > /dev/null
  
  RUN echo "Installing emulator" && \
      yes | "$ANDROID_HOME"/tools/bin/sdkmanager "emulator" > /dev/null
  
  RUN echo "Installing kotlin" && \
      wget --quiet -O sdk.install.sh "https://get.sdkman.io" && \
      bash -c "bash ./sdk.install.sh > /dev/null && source ~/.sdkman/bin/sdkman-init.sh && sdk install kotlin" && \
      rm -f sdk.install.sh
  
  RUN echo "Install Flutter sdk" && \
      cd /opt && \
      wget --quiet https://storage.googleapis.com/flutter_infra/releases/stable/linux/flutter_linux_1.17.1-stable.tar.xz -O flutter.tar.xz && \
      tar xf flutter.tar.xz && \
  
negative.code:     rm -rf /tmp/* /var/tmp/*
  
  # Install Android SDK
  RUN echo "sdk tools ${ANDROID_SDK_TOOLS_VERSION}" && \
      wget --quiet --output-document=sdk-tools.zip \
          "https://dl.google.com/android/repository/sdk-tools-linux-${ANDROID_SDK_TOOLS_VERSION}.zip" && \
      mkdir --parents "$ANDROID_HOME" && \
      unzip -q sdk-tools.zip -d "$ANDROID_HOME" && \
      rm --force sdk-tools.zip
  
  RUN echo "ndk ${ANDROID_NDK_VERSION}" && \
      wget --quiet --output-document=android-ndk.zip \
      "http://dl.google.com/android/repository/android-ndk-${ANDROID_NDK_VERSION}-linux-x86_64.zip" && \
      mkdir --parents "$ANDROID_NDK_HOME" && \
  