Failed to resolve maestrodev-ant

[tibers]

{{librarian-puppet update --verbose}} fails.

When attempting to run the above, we eventually fail with:
[Librarian] Backtracking from puppetlabs-apache/0.0.1 https://forgeapi.puppetlabs.com
[Librarian] Failed to resolve puppetlabs-apache (= 1.4.0) https://forgeapi.puppetlabs.com
[Librarian] Backtracking from maestrodev-ant/1.0.0 https://forgeapi.puppetlabs.com
[Librarian] Failed to resolve maestrodev-ant (>= 0) https://forgeapi.puppetlabs.com
Could not resolve the dependencies.
/usr/local/rvm/gems/ruby-1.9.3-p547/gems/librarian-0.1.2/lib/librarian/action/persist_resolution_mixin.rb:11:in persist_resolution' /usr/local/rvm/gems/ruby-1.9.3-p547/gems/librarian-0.1.2/lib/librarian/action/resolve.rb:27:inrun'
/usr/local/rvm/gems/ruby-1.9.3-p547/gems/librarian-0.1.2/lib/librarian/cli.rb:169:in resolve!' /usr/local/rvm/gems/ruby-1.9.3-p547/gems/librarian-0.1.2/lib/librarian/cli.rb:113:inupdate'
/usr/local/rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/command.rb:27:in run' /usr/local/rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/invocation.rb:126:ininvoke_command'
/usr/local/rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor.rb:359:in dispatch' /usr/local/rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/base.rb:440:instart'
/usr/local/rvm/gems/ruby-1.9.3-p547/gems/librarian-0.1.2/lib/librarian/cli.rb:26:in block (2 levels) in bin!' /usr/local/rvm/gems/ruby-1.9.3-p547/gems/librarian-0.1.2/lib/librarian/cli.rb:31:inreturning_status'
/usr/local/rvm/gems/ruby-1.9.3-p547/gems/librarian-0.1.2/lib/librarian/cli.rb:26:in block in bin!' /usr/local/rvm/gems/ruby-1.9.3-p547/gems/librarian-0.1.2/lib/librarian/cli.rb:47:inwith_environment'
/usr/local/rvm/gems/ruby-1.9.3-p547/gems/librarian-0.1.2/lib/librarian/cli.rb:26:in bin!' /usr/local/rvm/gems/ruby-1.9.3-p547/gems/librarian-puppet-1.3.2/bin/librarian-puppet:7:in<top (required)>'
/usr/local/rvm/gems/ruby-1.9.3-p547/bin/librarian-puppet:19:in load' /usr/local/rvm/gems/ruby-1.9.3-p547/bin/librarian-puppet:19:in

'
/usr/local/rvm/gems/ruby-1.9.3-p547/bin/ruby_executable_hooks:15:in eval' /usr/local/rvm/gems/ruby-1.9.3-p547/bin/ruby_executable_hooks:15:in'

Commenting this module out of our puppetfile solves the problem so I suspect it's an issue with this particular module.