anchor.diff:     bitops_1.0-6.tar.gz \
      RCurl_1.95-4.12.tar.gz \
      plyr_1.8.4.tar.gz \
  -   R6_2.4.0.tar.gz \
      httr_1.4.0.tar.gz \
      rstudioapi_0.10.tar.gz \
      sys_3.1.tar.gz \
  
positive.code:    downloader_0.4.tar.gz
  
  RUN rm \
     callr_3.2.0.tar.gz \
     processx_3.3.0.tar.gz \
     cli_1.1.0.tar.gz \
     pkgbuild_1.0.2.tar.gz \
  
negative.code: 
  RUN DEBIAN_FRONTEND=noninteractive R CMD INSTALL \
      clipr_0.4.1.tar.gz \
      modelr_0.1.2.tar.gz \
      reprex_0.2.0.tar.gz \
      tidyverse_1.2.1.tar.gz \
  