$ ruby_archdir=`ruby -rrbconfig -e "puts Config::CONFIG['sitearchdir']"`
$ libdir=`ruby -rrbconfig -e "puts Config::CONFIG['sitelibdir']"`
$ rm -rf ${buildroot}
$ ruby_archdir=`ruby -rrbconfig -e "puts Config::CONFIG['sitearchdir']"`
$ libdir=`ruby -rrbconfig -e "puts Config::CONFIG['sitelibdir']"`
$ rm -rf ${buildroot}