anchor.diff:     dplyr_0.7.0.tar.gz 
   
   RUN DEBIAN_FRONTEND=noninteractive wget \
  -   http://archive.linux.duke.edu/cran/src/contrib/chron_2.3-50.tar.gz \
  -   http://archive.linux.duke.edu/cran/src/contrib/data.table_1.10.4.tar.gz \
  -   http://archive.linux.duke.edu/cran/src/contrib/rematch_1.0.1.tar.gz \
  -   http://archive.linux.duke.edu/cran/src/contrib/cellranger_1.1.0.tar.gz \
  -   http://archive.linux.duke.edu/cran/src/contrib/tidyr_0.6.3.tar.gz \
  -   http://archive.linux.duke.edu/cran/src/contrib/googlesheets_0.2.2.tar.gz \
  -   http://archive.linux.duke.edu/cran/src/contrib/hms_0.3.tar.gz \
  -   http://archive.linux.duke.edu/cran/src/contrib/readr_1.1.1.tar.gz \
  -   http://archive.linux.duke.edu/cran/src/contrib/purrr_0.2.2.2.tar.gz \
  -   http://archive.linux.duke.edu/cran/src/contrib/selectr_0.3-1.tar.gz \
  -   http://archive.linux.duke.edu/cran/src/contrib/rvest_0.3.2.tar.gz \
  -   http://archive.linux.duke.edu/cran/src/contrib/pbkrtest_0.4-7.tar.gz 
  +   https://archive.linux.duke.edu/cran/src/contrib/chron_2.3-50.tar.gz \
  +   https://archive.linux.duke.edu/cran/src/contrib/data.table_1.10.4.tar.gz \
  +   https://archive.linux.duke.edu/cran/src/contrib/rematch_1.0.1.tar.gz \
  +   https://archive.linux.duke.edu/cran/src/contrib/cellranger_1.1.0.tar.gz \
  +   https://archive.linux.duke.edu/cran/src/contrib/tidyr_0.6.3.tar.gz \
  +   https://archive.linux.duke.edu/cran/src/contrib/googlesheets_0.2.2.tar.gz \
  +   https://archive.linux.duke.edu/cran/src/contrib/hms_0.3.tar.gz \
  +   https://archive.linux.duke.edu/cran/src/contrib/readr_1.1.1.tar.gz \
  +   https://archive.linux.duke.edu/cran/src/contrib/purrr_0.2.2.2.tar.gz \
  +   https://archive.linux.duke.edu/cran/src/contrib/selectr_0.3-1.tar.gz \
  +   https://archive.linux.duke.edu/cran/src/contrib/rvest_0.3.2.tar.gz \
  +   https://archive.linux.duke.edu/cran/src/contrib/pbkrtest_0.4-7.tar.gz 
   
   RUN DEBIAN_FRONTEND=noninteractive R CMD INSTALL \
      chron_2.3-50.tar.gz \
  
positive.code: 
  # install templates and examples from Reed and the Tufte package
  RUN DEBIAN_FRONTEND=noninteractive wget \
     http://archive.linux.duke.edu/cran/src/contrib/BHH2_2016.05.31.tar.gz
     
  RUN DEBIAN_FRONTEND=noninteractive R CMD INSTALL \
     BHH2_2016.05.31.tar.gz
  
negative.code: 
  # Cliburn Chan requested these:
  RUN DEBIAN_FRONTEND=noninteractive wget \
     https://archive.linux.duke.edu/cran/src/contrib/RColorBrewer_1.1-2.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/maps_3.2.0.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/zoo_1.8-0.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/gcookbook_1.0.tar.gz \
     https://archive.linux.duke.edu/cran/src/contrib/corrplot_0.77.tar.gz 
  
  
  RUN DEBIAN_FRONTEND=noninteractive R CMD INSTALL \
  