anchor.diff:     yaml_2.2.0.tar.gz \
      Rcpp_0.12.18.tar.gz \
      htmltools_0.3.6.tar.gz \
  -   caTools_1.17.1.1tar.gz \
  +   caTools_1.17.1.1.tar.gz \
      bitops_1.0-6.tar.gz \
      digest_0.6.16.tar.gz \
      mime_0.5.tar.gz
  
positive.code:    https://mirrors.nics.utk.edu/cran/src/contrib/yaml_2.2.0.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/Rcpp_0.12.18.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/htmltools_0.3.6.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/caTools_1.17.1.1tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/bitops_1.0-6.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/digest_0.6.16.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/glue_1.3.0.tar.gz \
  
negative.code: 
  RUN DEBIAN_FRONTEND=noninteractive R CMD INSTALL \
     bitops_1.0-6.tar.gz \
     caTools_1.17.1.1.tar.gz \
     digest_0.6.16.tar.gz \
     Rcpp_0.12.18.tar.gz \
     htmltools_0.3.6.tar.gz \
  