anchor.diff:     https://mirrors.nics.utk.edu/cran/src/contrib/prettyunits_1.0.2.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/progress_1.1.2.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/GGally_1.3.2.tar.gz \
  -   https://mirrors.nics.utk.edu/cran/src/contrib/ggformula_0.6.tar.gz \
  +   https://mirrors.nics.utk.edu/cran/src/contrib/ggformula_0.6.1.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/mosaicCore_0.4.2.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/mosaic_1.1.1.tar.gz 
   
  
positive.code:    progress_1.1.2.tar.gz \
     GGally_1.3.2.tar.gz \
     mosaicCore_0.4.2.tar.gz \
     ggformula_0.6.tar.gz \
     mosaic_1.1.1.tar.gz 
  
  RUN rm \
  
negative.code:    progress_1.1.2.tar.gz \
     GGally_1.3.2.tar.gz \
     mosaicCore_0.4.2.tar.gz \
     ggformula_0.6.1.tar.gz \
     mosaic_1.1.1.tar.gz 
  
  # Cliburn Chan requested these:
  