anchor.diff:      && apt-get clean \
       && apt-get autoremove -y \
           curl \
  +        gnupg2 \
       && rm -rf /var/lib/apt/lists/*
   
   RUN pip install unoconv==0.8.2
  
positive.code:     && apt-get clean \
      && apt-get autoremove -y \
          curl \
      && rm -rf /var/lib/apt/lists/* \
      && pip install -U pip \
      && pip install setuptools==37.0.0 \
  
negative.code: RUN apt-get update \
      && apt-get install -y \
          curl \
          gnupg2 \
      && gpg --keyserver pool.sks-keyservers.net --recv-keys AFEEAEA3 \
      && curl -SL "$LIBREOFFICE_MIRROR_URL/$LIBREOFFICE_VERSION/deb/x86_64/$LIBREOFFICE_ARCHIVE" -o $LIBREOFFICE_ARCHIVE \
      && curl -SL "$LIBREOFFICE_MIRROR_URL/$LIBREOFFICE_VERSION/deb/x86_64/$LIBREOFFICE_ARCHIVE.asc" -o $LIBREOFFICE_ARCHIVE.asc \
  