anchor.diff:     stringr_1.2.0.tar.gz \
      knitr_1.18.tar.gz \
      yaml_2.1.16.tar.gz \
  -   Rcpp_0.12.14.tar.gz \
  +   Rcpp_0.12.15.tar.gz \
      htmltools_0.3.6.tar.gz \
      caTools_1.17.1.tar.gz \
      bitops_1.0-6.tar.gz \
  -   digest_0.6.13.tar.gz \
  +   digest_0.6.14.tar.gz \
      mime_0.5.tar.gz
   
   # dependency for R XML library
  
positive.code:    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_0.12.14.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_1.1.1.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_0.6.13.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 \
  
negative.code: RUN DEBIAN_FRONTEND=noninteractive R CMD INSTALL \
     bitops_1.0-6.tar.gz \
     caTools_1.17.1.tar.gz \
     digest_0.6.14.tar.gz \
     Rcpp_0.12.15.tar.gz \
     htmltools_0.3.6.tar.gz \
     yaml_2.1.16.tar.gz \
     stringi_1.1.6.tar.gz \
  