mina init error message in 1.0.0.beta2

[devvmh]

Today I ran these commands

rails new blah
cd blah
echo "gem 'mina', '~> 1.0.0.beta2'" >> Gemfile
bundle install
mina init

Everything went fine, but mina init gave me this output:

$ mina init
-----> Created ./config/deploy.rb
Edit this file, then run `mina setup` after.
mina aborted!
Don't know how to build task 'debug_configuration_variables' (see --tasks)
/Users/devin/.rvm/gems/ruby-2.3.0/gems/mina-1.0.0.beta2/lib/mina/application.rb:16:in `run'
/Users/devin/.rvm/gems/ruby-2.3.0/gems/mina-1.0.0.beta2/bin/mina:4:in `<top (required)>'
/Users/devin/.rvm/gems/ruby-2.3.0/bin/mina:23:in `load'
/Users/devin/.rvm/gems/ruby-2.3.0/bin/mina:23:in `<main>'
/Users/devin/.rvm/gems/ruby-2.3.0/bin/ruby_executable_hooks:15:in `eval'
/Users/devin/.rvm/gems/ruby-2.3.0/bin/ruby_executable_hooks:15:in `<main>'
(See full trace by running task with --trace)

The deploy script was created OK.

[HappyEmu]

I have the same problem. Mina 1.0.0.beta2