anchor.diff:          wget \
           zip \
           zlib1g-dev
  +
  +COPY --from=xenial \
  +    /lib/x86_64-linux-gnu/libcrypto.so.1.0.0 \
  +    /lib/x86_64-linux-gnu/libssl.so.1.0.0 \
  +    /lib/x86_64-linux-gnu/
  +COPY --from=xenial \
  +    /usr/lib/x86_64-linux-gnu/libcurl-gnutls.so.* \
  +    /usr/lib/x86_64-linux-gnu/libffi.so.6.* \
  +    /usr/lib/x86_64-linux-gnu/libnettle.so.* \
  +    /usr/lib/x86_64-linux-gnu/
   
   # Install patchelf.
   RUN curl -sS https://releases.nixos.org/patchelf/patchelf-0.9/patchelf-0.9.tar.bz2 | tar -C /tmp -xj && \
  
positive.code: # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  FROM ubuntu:20.04
  
  RUN mkdir /data
  
negative.code:         libcurl4-openssl-dev \
          libffi-dev \
          libgdbm-dev \
          libidn11 \
          liblzma-dev \
          libncurses5-dev \
          libncursesw5 \
          libnss3-dev \
          libreadline-dev \
          libsqlite3-dev \
          libssl-dev \
          libtinfo5 \
          locales \
          lsb-release \
          net-tools \
  