anchor.diff:  
   RUN rm \
       shinystan_2.5.0.tar.gz \
  -    StanHeaders_2.17.2.tar.gz \
       rstanarm_2.17.4.tar.gz \
       tidyposterior_0.0.1.tar.gz \
       yardstick_0.0.1.tar.gz \
  
positive.code:     bayesplot_1.6.0.tar.gz \
      matrixStats_0.54.0.tar.gz \
      loo_2.0.0.tar.gz \
      inline_0.3.15.tar.gz \
      rstan_2.17.3.tar.gz \
      rstantools_1.5.1.tar.gz \
  
negative.code: 
  RUN DEBIAN_FRONTEND=noninteractive wget \
      https://mirrors.nics.utk.edu/cran/src/contrib/shinystan_2.5.0.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/rstanarm_2.17.4.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/tidyposterior_0.0.1.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/yardstick_0.0.1.tar.gz \
  