rbx tests fail with "Requested binary installation but no rubies are available to download"

Question

I am writing a gem and I'm targeting Ruby, JRuby, and Rubinius. I'm using Travis CI to build my library. When I target Ruby and JRuby, my gem builds correctly, but when targeting Rubinius, it does not work. Here is the error:

Using worker: worker-linux-2-2.bb.travis-ci.org:travis-linux-13   
git.1   
$ git clone --depth=50 --branch=master git://github.com/maxgale/actor.git maxgale/actor
Cloning into 'maxgale/actor'...
remote: Counting objects: 74, done.
remote: Compressing objects: 100% (48/48), done.
remote: Total 74 (delta 29), reused 64 (delta 22)
Receiving objects: 100% (74/74), 12.06 KiB | 0 bytes/s, done.
Resolving deltas: 100% (29/29), done.
Checking connectivity... done.

$ cd maxgale/actor
git.3
$ git checkout -qf f83f26d85f69e9c2965a4faa2065dd37ac789c36
$ rvm use rbx --install --binary --fuzzy
rbx is not installed - installing.
Searching for binary rubies, this might take some time.
Requested binary installation but no rubies are available to download, consider skipping --binary flag.

Gemset '' does not exist, 'rvm rbx do rvm gemset create ' first, or append '--create'.
The command "rvm use rbx --install --binary --fuzzy" failed and exited with 2 during setup.

Your build has been stopped.

Here is my .travis.yml file:

language: ruby
cache: bundler

gemfile:
  - gemfiles/Gemfile.travis
rvm:
  - 2.0.0
  - 1.9.3
  - jruby-19mode
  - rbx

gemfiles/Gemfile.travis:

platforms :rbx do
  gem 'rubysl', '~> 2.0'
end

eval_gemfile File.expand_path('../../Gemfile', __FILE__)

My normal Gemfile:

source 'https://rubygems.org'

gemspec path: File.expand_path('../', __FILE__)

Answer 1

I was able to solve this problem by targeting rbx-2 instead of rbx. My .travis.yml ended up looking like this:

language: ruby
cache: bundler

gemfile:
  - gemfiles/Gemfile.travis
rvm:
  - 2.0.0
  - 1.9.3
  - jruby-19mode
  - rbx-2