Failure to run chef-dev-setup because of outdated rvm versions

install.sh.log

Installing Ruby from source to: /Users/reid/.rvm/rubies/ruby-2.1.2, this may take a while depending on your cpu(s)...
ruby-2.1.2 - #downloading ruby-2.1.2, this may take a while depending on your connection...
To install do: 'rvm install ruby-2.1.2'

rvm rubies

   ruby-1.9.3-p448 [ x86_64 ]

# Default ruby not set. Try 'rvm alias create default <ruby>'.

# => - current
# =* - current && default
#  * - default
STDERR: Warning: found user selected compiler 'clang', this will suppress RVM auto detection mechanisms.
There is no checksum for 'http://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.2.tar.bz2' or 'ruby-2.1.2.tar.bz2', it's not possible to validate it.
This could be because your RVM install's list of versions is out of date. You may want to
update your list of rubies by running 'rvm get stable' and try again.
If that does not resolve the issue and you wish to continue with unverified download
add '--verify-downloads 1' after the command.

There has been an error fetching the ruby interpreter. Halting the installation.
ruby-2.1.2 is not installed.
---- End output of "bash"  "/tmp/chef-script20141008-41945-pt2cvx" ----
Ran "bash"  "/tmp/chef-script20141008-41945-pt2cvx" returned 1