# wget 'http://core.ring.gr.jp/archives/lang/ruby/ruby-1.8.7-p330.tar.gz'
# tar zxvf ruby-1.8.7-p330.tar.gz
# cd ruby-1.8.7-p330
# ./configure --prefix=/usr
# make && make test
# checkinstall --fstrans=no
# rpm -ivh /usr/src/redhat/RPMS/i386/ruby-1.8.7-p330-1.i386.rpm