anchor.diff:  RUN DEBIAN_FRONTEND=noninteractive wget \
      https://mirrors.nics.utk.edu/cran/src/contrib/rstudioapi_0.6.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/openssl_0.9.6.tar.gz \
  -   https://mirrors.nics.utk.edu/cran/src/contrib/withr_1.0.2.tar.gz \
  +   https://mirrors.nics.utk.edu/cran/src/contrib/withr_2.0.0.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_1.1.5.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/magrittr_1.5.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/stringr_1.2.0.tar.gz \
      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_0.18.0.tar.gz \
  -   https://mirrors.nics.utk.edu/cran/src/contrib/devtools_1.13.2.tar.gz \
  +   https://mirrors.nics.utk.edu/cran/src/contrib/git2r_0.19.0.tar.gz \
  +   https://mirrors.nics.utk.edu/cran/src/contrib/devtools_1.13.3.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_1.2.1.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/RCurl_1.95-4.8.tar.gz \
  -   https://mirrors.nics.utk.edu/cran/src/contrib/Rcpp_0.12.11.tar.gz \
  +   https://mirrors.nics.utk.edu/cran/src/contrib/Rcpp_0.12.12.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/BH_1.62.0-1.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/xml2_1.1.1.tar.gz \
  -   https://mirrors.nics.utk.edu/cran/src/contrib/curl_2.7.tar.gz \
  +   https://mirrors.nics.utk.edu/cran/src/contrib/curl_2.8.1.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/jsonlite_1.5.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/digest_0.6.12.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/downloader_0.4.tar.gz \
  
positive.code:    plogr_0.1-1.tar.gz \
     bindr_0.1.tar.gz \
     bindrcpp_0.2.tar.gz \
     dplyr_0.7.1.tar.gz 
  
  RUN rm \
     openintro_1.4.tar.gz \
  
negative.code:    https://mirrors.nics.utk.edu/cran/src/contrib/glue_1.1.1.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/pkgconfig_2.0.1.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/plogr_0.1-1.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/dplyr_0.7.2.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/assertthat_0.2.0.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/R6_2.2.2.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/magrittr_1.5.tar.gz \
  