anchor.diff:  liblzma5 \
   libncurses5 \
   p11-kit \
  -libcairo2 \
  -gfortran \
  -r-base \
  -time \
  +libcurl3-gnutls \
  +libcurl4 \
  +moreutils \
  +google-perftools \
   unattended-upgrades && \
   unattended-upgrade -d -v && \
   apt-get remove -yq unattended-upgrades && \
  
positive.code: RUN apt-get install -yq --no-install-recommends libbz2-dev
  RUN apt-get install -yq --no-install-recommends unzip
  RUN apt-get install -yq --no-install-recommends libpng-dev
  RUN DEBIAN_FRONTEND="noninteractive" apt-get install -yq --no-install-recommends tzdata
  RUN apt-get install -yq --no-install-recommends r-base
  RUN apt-get install -yq --no-install-recommends libcurl4-openssl-dev
  RUN apt-get install -yq --no-install-recommends libxml2-dev
  
negative.code: RUN apt-key adv --keyserver keyserver.ubuntu.com --recv-keys E298A3A825C0D65DFD57CBB651716619E084DAB9
  RUN apt-get -yq update
  
  ENV DEBIAN_FRONTEND "noninteractive" 
  # no benefit of combined in builder stage
  RUN apt-get install -yq --no-install-recommends locales
  RUN apt-get install -yq --no-install-recommends g++
  