new_contents: from spack import *
  
  class R(Package):
      """R is 'GNU S', a freely available language and environment for
         statistical computing and graphics which provides a wide va
         riety of statistical and graphical techniques: linear and
         nonlinear modelling, statistical tests, time series analysis,
         classification, clustering, etc. Please consult the R project
         homepage for further information."""
      homepage = "http://www.example.com"
      url      = "http://cran.cnr.berkeley.edu/src/base/R-3/R-3.1.2.tar.gz"
  
      version('3.1.2', '3af29ec06704cbd08d4ba8d69250ae74')
  
      depends_on("readline")
      depends_on("ncurses")
      depends_on("icu")
      depends_on("glib")
      depends_on("zlib")
      depends_on("libtiff")
      depends_on("jpeg")
      depends_on("cairo")
      depends_on("pango")
      depends_on("freetype")
      depends_on("tcl")
      depends_on("tk")
  
      def install(self, spec, prefix):
          configure("--prefix=%s" % prefix,
                    "--enable-R-shlib",
                    "--enable-BLAS-shlib")
          make()
          make("install")
  
subject: Add R package.