anchor.diff:  COPY r-packages/ph-290.r /tmp/r-packages/
   RUN r /tmp/r-packages/ph-290.r
   
  -
   ENV PATH ${CONDA_DIR}/bin:$PATH:/usr/lib/rstudio-server/bin
   
   # Set this to be on container storage, rather than under $HOME
  
positive.code: RUN sed -i -e '/^R_LIBS_USER=/s/^/#/' /etc/R/Renviron && \
      echo "R_LIBS_USER=${R_LIBS_USER}" >> /etc/R/Renviron
  
  COPY  class-libs.R /tmp/class-libs.R
  # Install all our base R packages
  COPY install.R  /tmp/install.R
  RUN /tmp/install.R && \
      rm -rf /tmp/downloaded_packages
  
  
  RUN mkdir -p /tmp/r-packages
  
  # pdftools
  
negative.code: # Create user owned R libs dir
  # This lets users temporarily install packages
  ENV R_LIBS_USER /opt/r
  RUN install -d -o ${NB_USER} -g ${NB_USER} ${R_LIBS_USER}
  
  RUN apt-get -qq update --yes && \
      apt-get -qq install --yes \
  