anchor.diff:  export R_LIBS=~/build/revdeplib/
   export R_LIBS_SITE=none
   export _R_CHECK_FORCE_SUGGESTS_=false         # in my profile so always set
  -Rdevel
  +R
   .libPaths()   # should be just 2 items: revdeplib and the base R package library
   options(repos = c("CRAN"=c("http://cloud.r-project.org")))
   update.packages(ask=FALSE)
  
positive.code: sudo apt-get -y install python-dev  # for PythonInR
  sudo apt-get -y install gdal-bin libgeos-dev  # for rgdal/raster tested via lidR
  sudo apt-get build-dep r-cran-rsymphony   # for Rsymphony: coinor-libcgl-dev coinor-libclp-dev coinor-libcoinutils-dev coinor-libosi-dev coinor-libsymphony-dev
  sudo R CMD javareconf
  # ENDIF
  
  
negative.code: }
  
  # ** ensure latest version installed into revdeplib **
  system("R CMD INSTALL ~/GitHub/data.table/data.table_1.11.9.tar.gz")
  run("rerun.all")
  
  out = function(fnam="~/fail.log") {
  