anchor.diff:  
   # install the necessary R packages
   COPY install.r /tmp/install.r
  -RUN mkdir -p /usr/share/doc/R-3.5.1/html && Rscript /tmp/install.r
  +RUN mkdir -p /usr/share/doc/R-3.6.0/html && Rscript /tmp/install.r
   
   # copy over the .netrc template file
   COPY netrc /root/netrc.template
  
positive.code:     # for creating the netrc file from the template (envsubst)
      gettext \
      # for installing R and the various additional packages
      R-3.5.1 \
      make \
      libcurl-devel \
      libxml2-devel \
  
negative.code: FROM adoptopenjdk/openjdk15:x86_64-centos-jdk-15.0.2_7
  #FROM openjdk:15.0.2-jdk-oraclelinux7
  
  ENV LANG en_US.utf8
  
  # copy in some additional yum repositories
  #COPY public-yum-ol7.repo /etc/yum.repos.d
  RUN yum -y -q install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
  RUN yum-config-manager --enable ol7_optional_latest
  RUN yum -y -q install \
      #for R
  