Gem building was disabled following the transition to Rackspace due to the need for architectural adjustments and the setup of a new virtual machine, which were deemed unnecessary impediments to the move. After a week of consideration, it was decided not to reinstate the gem builder, as tools like Jeweler and Gemcutter simplify the process of publishing gems, making the original use case of forking, changing, publishing, and installing a gem more straightforward. While Gemcutter is working on implementing namespace support, the community is encouraged to contribute to this effort. Old gems will continue to be available at gems.github.com for at least another year.