anchor.diff:      https://archive.linux.duke.edu/cran/src/contrib/bench_1.0.1.tar.gz 
   
   RUN DEBIAN_FRONTEND=noninteractive R CMD INSTALL \
  -    modelr_0.1.2.tar.gz \
  +    modelr_0.1.4.tar.gz \
       prex_0.2.0.tar.gz \
       tidyverse_1.2.1.tar.gz \
       promises_1.0.1.tar.gz \
  -    globals_0.12.2.tar.gz \
  +    globals_0.12.4.tar.gz \
       listenv_0.7.0.tar.gz \
       future_1.12.0.tar.gz \
       iterators_1.0.10.tar.gz \
  
positive.code:     rticles_0.7.tar.gz \
      styler_1.1.0.tar.gz \
      lintr_1.0.3.tar.gz \
      testthat_2.0.0.tar.gz \
      reprex_0.2.0.tar.gz \
      microbenchmark_1.4-4.tar.gz \
      bench_1.0.1.tar.gz 
  
  
  RUN DEBIAN_FRONTEND=noninteractive wget \
      https://archive.linux.duke.edu/cran/src/contrib/pryr_0.1.4.tar.gz \
      https://archive.linux.duke.edu/cran/src/contrib/profvis_0.3.5.tar.gz \
      https://archive.linux.duke.edu/cran/src/contrib/RcppArmadillo_0.9.100.5.0.tar.gz \
      https://archive.linux.duke.edu/cran/src/contrib/servr_0.10.tar.gz \
      https://archive.linux.duke.edu/cran/src/contrib/xaringan_0.7.tar.gz \
      https://archive.linux.duke.edu/cran/src/contrib/rsconnect_0.8.8.tar.gz \
      https://archive.linux.duke.edu/cran/src/contrib/PKI_0.1-5.1.tar.gz \
      https://archive.linux.duke.edu/cran/src/contrib/RJSONIO_1.3-0.tar.gz \
      https://archive.linux.duke.edu/cran/src/contrib/packrat_0.4.9-3.tar.gz \
      https://archive.linux.duke.edu/cran/src/contrib/highlight_0.4.7.2.tar.gz \
      https://archive.linux.duke.edu/cran/src/contrib/pkgdown_1.1.0.tar.gz \
      https://archive.linux.duke.edu/cran/src/contrib/bookdown_0.7.tar.gz \
      https://archive.linux.duke.edu/cran/src/contrib/blogdown_0.8.tar.gz \
      https://archive.linux.duke.edu/cran/src/contrib/cowplot_0.9.3.tar.gz \
      https://archive.linux.duke.edu/cran/src/contrib/influenceR_0.1.0.tar.gz \
      https://archive.linux.duke.edu/cran/src/contrib/Rook_1.1-1.tar.gz \
  
negative.code: 
  	
  RUN DEBIAN_FRONTEND=noninteractive wget \
     https://archive.linux.duke.edu/cran/src/contrib/rgdal_1.4-3.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/rgeos_0.4-2.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/uuid_0.1-2.tar.gz
   
   
  RUN DEBIAN_FRONTEND=noninteractive R CMD INSTALL \
     rgdal_1.4-3.tar.gz \
     rgeos_0.4-2.tar.gz \
     uuid_0.1-2.tar.gz 
  
  RUN rm \
     rgdal_1.4-3.tar.gz \
     rgeos_0.4-2.tar.gz \
     uuid_0.1-2.tar.gz
  
  RUN R CMD BATCH /r-studio/install-rappdirs.R
  