rvm1-capistrano3 error not finding ruby - ruby

Question

I'm heaving troubles with deploy script. it's failing with following output -
DEBUG[3852918b] Command: cd
/var/www/billing.staging/releases/20140829073745 &&
/tmp/billing-deploy/rvm-auto.sh 2.1.2 gem install --file Gemfile
DEBUG[3852918b] ruby-2.1.2 is not installed. DEBUG[3852918b] Ruby
ruby-2.1.2 is not installed. DEBUG[3852918b] Can not find ruby for
'2.1.2'. cap aborted! SSHKit::Runner::ExecuteError: Exception while
executing on host 5.9.119.212: gem exit status: 103 gem stdout:
Nothing written gem stderr: ruby-2.1.2 is not installed. Ruby
ruby-2.1.2 is not installed. Can not find ruby for '2.1.2'.
my script :
# config valid only for Capistrano 3.1
lock '3.1.0'
set :application, 'billing'
set :repo_url, 'git#github.com:aviacentr/Billing.git'
set :keep_releases, 5
set :linked_files, %w{config/database.yml config/secrets.yml config/billing.yml}
set :linked_dirs, %w{bin log tmp/pids tmp/cache tmp/sockets vendor/bundle public/system}
# Default branch is :master
# ask :branch, proc { `git rev-parse --abbrev-ref HEAD`.chomp }
# Default deploy_to directory is /var/www/my_app
# set :deploy_to, '/var/www/my_app'
set :bundle_servers, -> { release_roles(fetch(:bundle_roles)) } # this is default
set :bundle_binstubs, -> { shared_path.join('bin') } # this is default
set :bundle_gemfile, -> { release_path.join('Gemfile') } # default: nil
set :bundle_path, -> { shared_path.join('bundle') } # this is default
set :bundle_without, %w{development test}.join(' ') # this is default
set :bundle_flags, '--deployment --quiet ' # this
# is default
set :bundle_env_variables, {}
set :rvm1_ruby_version, "2.1.2"
# this is default
# Default value for :scm is :git
# set :scm, :git
# Default value for :format is :pretty
set :format, :pretty
# Default value for :log_level is :debug
# set :log_level, :debug
# Default value for :pty is false
# set :pty, true
# Default value for :linked_files is []
# set :linked_files, %w{config/database.yml}
# Default value for linked_dirs is []
# set :linked_dirs, %w{bin log tmp/pids tmp/cache tmp/sockets vendor/bundle public/system}
# Default value for default_env is {}
# set :default_env, { path: "/opt/ruby/bin:$PATH" }
# require 'mongodb_logger/capistrano'
# set :mongodb_logger_assets_dir, "public/assets" # where to put mongodb assets
# after 'deploy:update_code', 'mongodb_logger:precompile'
# Default value for keep_releases is 5
set :keep_releases, 3
set :branch, ENV['branch'] || 'master' # e.g. cap staging deploy branch=dev
namespace :deploy do
desc 'Restart application'
task :restart do
on roles(:app), in: :sequence, wait: 5 do
# Your restart mechanism here, for example:
# execute :touch, release_path.join('tmp/restart.txt')
end
end
after :publishing, :restart
after :restart, :clear_cache do
on roles(:web), in: :groups, limit: 3, wait: 10 do
# Here we can do anything such as:
# within release_path do
# execute :rake, 'cache:clear'
# end
end
end
end
after 'deploy:publishing', 'deploy:restart'
namespace :deploy do
task :restart do
invoke 'unicorn:restart'
end
end
before 'deploy', 'rvm1:install:rvm'
before 'deploy', 'rvm1:install:ruby' # install/update Ruby
before 'deploy', 'rvm1:install:gems'
before 'deploy', 'rvm1:hook'
# after 'deploy:publishing', 'binstubs'
# task :binstubs do
# run 'gem regenerate_binstubs'
# end
Could you help me with this issue?