anchor.diff:  # R packages we need for devtools - and we need devtools to be able to update the rmarkdown package
   RUN DEBIAN_FRONTEND=noninteractive wget \
      https://mirrors.nics.utk.edu/cran/src/contrib/rstudioapi_0.7.tar.gz \
  -   https://mirrors.nics.utk.edu/cran/src/contrib/openssl_0.9.9.tar.gz \
  -   https://mirrors.nics.utk.edu/cran/src/contrib/withr_2.1.1.tar.gz \
  +   https://mirrors.nics.utk.edu/cran/src/contrib/openssl_1.0.1.tar.gz \
  +   https://mirrors.nics.utk.edu/cran/src/contrib/withr_2.1.2.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/brew_1.0-6.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/stringi_1.1.7.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/magrittr_1.5.tar.gz \
  
positive.code:    mime_0.5.tar.gz \
     httr_1.3.1.tar.gz \
     rstudioapi_0.7.tar.gz \
     openssl_0.9.9.tar.gz \
     withr_2.1.1.tar.gz \
     brew_1.0-6.tar.gz \
     stringi_1.1.7.tar.gz \
     magrittr_1.5.tar.gz \
     stringr_1.3.0.tar.gz \
     roxygen2_5.0.1.tar.gz \
     BH_1.65.0-1.tar.gz \
     XML_3.98-1.9.tar.gz \
     xml2_1.1.1.tar.gz \
     curl_3.1.tar.gz \
     rversions_1.0.3.tar.gz \
     git2r_0.21.0.tar.gz \
     devtools_1.13.4.tar.gz \
     downloader_0.4.tar.gz
  
  
  
negative.code:    https://mirrors.nics.utk.edu/cran/src/contrib/Archive/roxygen2/roxygen2_5.0.1.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/rversions_1.0.3.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/git2r_0.21.0.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/devtools_1.13.5.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/R6_2.2.2.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/mime_0.5.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/httr_1.3.1.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/RCurl_1.95-4.10.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/Rcpp_0.12.16.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/BH_1.65.0-1.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/xml2_1.2.0.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/curl_3.1.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/jsonlite_1.5.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/digest_0.6.15.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/downloader_0.4.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/memoise_1.1.0.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/plyr_1.8.4.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/XML_3.98-1.10.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/whisker_0.3-2.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/bitops_1.0-6.tar.gz
  
  