Building ruby 1.9 rpms

[root@box ~]# yum -y groupinstall "Development Tools" 

[root@box ~]# yum --enablerepo=epel -y install libyaml libyaml-devel readline-devel ncurses-devel gdbm-devel tcl-devel openssl-devel db4-devel libffi-devel

Next, stand boldly on the shoulders of others:

[root@box ~]# mkdir -p rpmbuild/{BUILD,BUILDROOT,RPMS,SOURCES,SPECS,SRPMS}
 # get source
 [root@box ~]# wget http://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.3-p429.tar.gz -P rpmbuild/SOURCES
 # get SPEC file
 [root@box ~]# wget https://raw.github.com/imeyer/ruby-1.9.3-rpm/master/ruby19.spec -P rpmbuild/SPECS
 [root@box ~]# rpmbuild -bb rpmbuild/SPECS/ruby19.spec
 [root@box ~]# rpm -Uvh rpmbuild/RPMS/x86_64/ruby-1.9.3p429-1.el6.x86_64.rpm
 Preparing... ###################################### [100%]
 1:ruby ###################################### [100%]

Thank You, Internet!