anchor.diff:          "build-tools;25.0.3" "build-tools;25.0.2" \
           "build-tools;25.0.1" "build-tools;25.0.0" \
           "build-tools;24.0.3" "build-tools;24.0.2" \
  -        "build-tools;24.0.1" "build-tools;24.0.0" > /dev/null && \
  -    echo "Installing build tools " && \
  +        "build-tools;24.0.1" "build-tools;24.0.0" > /dev/null
  +
  +RUN echo "Installing build tools " && \
       yes | "$ANDROID_HOME"/tools/bin/sdkmanager \
           "build-tools;23.0.3" "build-tools;23.0.2" "build-tools;23.0.1" \
           "build-tools;22.0.1" \
  
positive.code:     apt-get install -qq locales > /dev/null && \
      locale-gen "$LANG" > /dev/null && \
      apt-get install -qq --no-install-recommends \
          build-essential \
          autoconf \
          curl \
          git \
          file \
          less \
          vim-tiny \
          gpg-agent \
          lib32stdc++6 \
          lib32z1 \
          lib32z1-dev \
  
negative.code:     "http://dl.google.com/android/repository/android-ndk-r${ANDROID_NDK_VERSION}-linux-x86_64.zip" && \
      mkdir --parents "$ANDROID_NDK_HOME" && \
      unzip -q android-ndk.zip -d "$ANDROID_NDK" && \
      rm --force android-ndk.zip
  
  # Install SDKs
  # Please keep these in descending order!
  # The `yes` is for accepting all non-standard tool licenses.
  RUN mkdir --parents "$HOME/.android/" && \
      echo '### User Sources for Android SDK Manager' > \
          "$HOME/.android/repositories.cfg" && \
      yes | "$ANDROID_HOME"/tools/bin/sdkmanager --licenses > /dev/null
  
  RUN echo "Installing platforms" && \
      yes | "$ANDROID_HOME"/tools/bin/sdkmanager \
          "platforms;android-29" \
          "platforms;android-28" \
  