anchor.diff:  # mccahill/r-studio
   #
  -# VERSION 1.1
  +# VERSION 1.2
   
   FROM   ubuntu:16.04
   MAINTAINER Mark McCahill "mark.mccahill@duke.edu"
  
positive.code:    gdebi-core \
     libapparmor1
     
  #RUN DEBIAN_FRONTEND=noninteractive wget https://s3.amazonaws.com/rstudio-dailybuilds/rstudio-server-1.0.143-amd64.deb
  #RUN DEBIAN_FRONTEND=noninteractive gdebi -n rstudio-server-1.0.143-amd64.deb
  #RUN rm rstudio-server-1.0.143-amd64.deb
  
  RUN DEBIAN_FRONTEND=noninteractive wget https://s3.amazonaws.com/rstudio-dailybuilds/rstudio-server-1.1.345-amd64.deb
  RUN DEBIAN_FRONTEND=noninteractive gdebi -n rstudio-server-1.1.345-amd64.deb
  RUN rm rstudio-server-1.1.345-amd64.deb
  
  # update the R packages we will need for knitr
  RUN DEBIAN_FRONTEND=noninteractive wget \
  
negative.code: RUN echo  "deb http://cran.rstudio.com/bin/linux/ubuntu xenial/" >>  /etc/apt/sources.list
  RUN DEBIAN_FRONTEND=noninteractive apt-key adv --keyserver keyserver.ubuntu.com --recv-keys  E084DAB9
  
  RUN apt-get  update ; \
      apt-get  dist-upgrade -y 
  
  # we want OpenBLAS for faster linear algebra as described here: http://brettklamer.com/diversions/statistical/faster-blas-in-r/
  RUN apt-get install  -y \
  