appium_lib won't load

env.rb

require 'lapis_lazuli'
require 'lapis_lazuli/cucumber'


LapisLazuli::WorldModule::Config.config_file = "config/config.yml"
World(LapisLazuli)
 
 
class AppiumWorld
end
 
require 'rubygems'
require 'appium_lib'


this_dir = File.expand_path(File.dirname(__FILE__))
puts this_dir

APP_PATH = './chatbeta.apk'

desired_caps = {
    caps: {
        platformName: 'Android',
        deviceName: '',
        app: APP_PATH,
    },
    appium_lib: {
        port: 4723,
    }
}

Appium::Driver.new(desired_caps).start_driver
Appium.promote_appium_methods AppiumWorld

World do
  AppiumWorld.new
end

Before { $driver.start_driver }
After { $driver.driver_quit }




################
stacktrace:
################
cannot load such file -- appium_lib (LoadError)
/Users/sp/MTA/ChatApp/features/support/env.rb:17:in `require'
/Users/sp/MTA/ChatApp/features/support/env.rb:17:in `<top (required)>'
/Users/sp/.rvm/gems/ruby-2.2.1/gems/cucumber-1.3.19/lib/cucumber/rb_support/rb_language.rb:95:in `load'
/Users/sp/.rvm/gems/ruby-2.2.1/gems/cucumber-1.3.19/lib/cucumber/rb_support/rb_language.rb:95:in `load_code_file'
/Users/sp/.rvm/gems/ruby-2.2.1/gems/cucumber-1.3.19/lib/cucumber/runtime/support_code.rb:180:in `load_file'
/Users/sp/.rvm/gems/ruby-2.2.1/gems/cucumber-1.3.19/lib/cucumber/runtime/support_code.rb:83:in `block in load_files!'
/Users/sp/.rvm/gems/ruby-2.2.1/gems/cucumber-1.3.19/lib/cucumber/runtime/support_code.rb:82:in `each'
/Users/sp/.rvm/gems/ruby-2.2.1/gems/cucumber-1.3.19/lib/cucumber/runtime/support_code.rb:82:in `load_files!'
/Users/sp/.rvm/gems/ruby-2.2.1/gems/cucumber-1.3.19/lib/cucumber/runtime.rb:184:in `load_step_definitions'
/Users/sp/.rvm/gems/ruby-2.2.1/gems/cucumber-1.3.19/lib/cucumber/runtime.rb:42:in `run!'
/Users/sp/.rvm/gems/ruby-2.2.1/gems/cucumber-1.3.19/lib/cucumber/cli/main.rb:47:in `execute!'
/Users/sp/.rvm/gems/ruby-2.2.1/gems/cucumber-1.3.19/bin/cucumber:13:in `<top (required)>'
/Users/sp/.rvm/gems/ruby-2.2.1/bin/cucumber:22:in `load'
/Users/sp/.rvm/gems/ruby-2.2.1/bin/cucumber:22:in `<main>'
/Users/sp/.rvm/gems/ruby-2.2.1/bin/ruby_executable_hooks:15:in `eval'
/Users/sp/.rvm/gems/ruby-2.2.1/bin/ruby_executable_hooks:15:in `<main>'