anchor.diff:     gridExtra_2.2.1.tar.gz \
      ggdendro_0.1-20.tar.gz \
      mnormt_1.5-5.tar.gz \
  -   psych_1.6.9.tar.gz \
  -   broom_0.4.1.tar.gz \
  +   psych_1.6.12.tar.gz \
  +   broom_0.4.2.tar.gz \
      reshape_0.8.6.tar.gz \
      prettyunits_1.0.2.tar.gz \
      progress_1.1.2.tar.gz \
  
positive.code:    http://archive.linux.duke.edu/cran/src/contrib/gridExtra_2.2.1.tar.gz \
     http://archive.linux.duke.edu/cran/src/contrib/ggdendro_0.1-20.tar.gz \
     http://archive.linux.duke.edu/cran/src/contrib/mnormt_1.5-5.tar.gz \
     http://archive.linux.duke.edu/cran/src/contrib/psych_1.6.9.tar.gz \
     http://archive.linux.duke.edu/cran/src/contrib/broom_0.4.1.tar.gz \
     http://archive.linux.duke.edu/cran/src/contrib/reshape_0.8.6.tar.gz \
     http://archive.linux.duke.edu/cran/src/contrib/prettyunits_1.0.2.tar.gz \
     http://archive.linux.duke.edu/cran/src/contrib/progress_1.1.2.tar.gz \
  
negative.code:    pbkrtest_0.4-7.tar.gz 
  
  RUN DEBIAN_FRONTEND=noninteractive wget \
     http://archive.linux.duke.edu/cran/src/contrib/SparseM_1.76.tar.gz \
     http://archive.linux.duke.edu/cran/src/contrib/MatrixModels_0.4-1.tar.gz \
     http://archive.linux.duke.edu/cran/src/contrib/quantreg_5.29.tar.gz \
     http://archive.linux.duke.edu/cran/src/contrib/car_2.1-4.tar.gz \
  