embulk-output-bigquery installation with embulk v0.8.10

gistfile1.txt

$ .embulk/bin/embulk gem install embulk-output-bigquery --debug
2016-07-23 01:31:59.082 -0700: Embulk v0.8.10
NOTE:  Debugging mode prints all exceptions even when rescued
Exception `LoadError' at org/jruby/RubyKernel.java:944 - no such file to load -- cgi/escape
Exception `Resolv::DNS::Config::NXDomain' at uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/resolv.rb:553 - _rubygems._tcp.api.rubygems.org
Exception `Resolv::DNS::Config::NXDomain' at uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/resolv.rb:553 - _rubygems._tcp.api.rubygems.org
Exception `Resolv::DNS::Config::NXDomain' at uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/resolv.rb:553 - _rubygems._tcp.api.rubygems.org.hsd1.ca.comcast.net
Exception `Resolv::DNS::Config::NXDomain' at uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/resolv.rb:553 - _rubygems._tcp.api.rubygems.org.hsd1.ca.comcast.net
Exception `Resolv::ResolvError' at uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/resolv.rb:498 - DNS result has no information for _rubygems._tcp.api.rubygems.org
Exception `NoMethodError' at /Users/muga/.embulk/bin/embulk!/embulk/command/embulk_run.rb:344 - undefined method `jar_path' for Gem:Module
Exception `NoMethodError' at /Users/muga/.embulk/bin/embulk!/embulk/command/embulk_run.rb:344 - undefined method `jar_path' for Gem:Module
ERROR:  While executing gem ... (NoMethodError)
    undefined method `jar_path' for Gem:Module
	/Users/muga/.embulk/bin/embulk!/embulk/command/embulk_run.rb:344:in `block in ruby'
	uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/installer.rb:552:in `shebang'
	uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/installer.rb:699:in `app_script_text'
	uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/installer.rb:499:in `block in generate_bin_script'
	org/jruby/RubyIO.java:1131:in `open'
	uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/installer.rb:498:in `generate_bin_script'
	uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/installer.rb:478:in `block in generate_bin'
	org/jruby/RubyArray.java:1593:in `each'
	uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/installer.rb:462:in `generate_bin'
	uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/installer.rb:302:in `install'
	uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/resolver/specification.rb:97:in `install'
	uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/request_set.rb:166:in `block in install'
	org/jruby/RubyArray.java:1593:in `each'
	uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/request_set.rb:156:in `install'
	uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/commands/install_command.rb:205:in `install_gem'
	uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/commands/install_command.rb:255:in `block in install_gems'
	org/jruby/RubyArray.java:1593:in `each'
	uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/commands/install_command.rb:251:in `install_gems'
	uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/commands/install_command.rb:158:in `execute'
	uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/command.rb:310:in `invoke_with_build_args'
	uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/command_manager.rb:169:in `process_args'
	uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/command_manager.rb:139:in `run'
	uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/gem_runner.rb:55:in `run'
	/Users/muga/.embulk/bin/embulk!/embulk/command/embulk_run.rb:165:in `run'
	/Users/muga/.embulk/bin/embulk!/embulk/command/embulk_main.rb:2:in `<top>'
	org/jruby/RubyKernel.java:944:in `require'
	uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/core_ext/kernel_require.rb:1:in `(root)'
	file:/Users/muga/.embulk/bin/embulk!/embulk/command/embulk_bundle.rb:51:in `<top>'
Exception `Gem::SystemExitException' at uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/user_interaction.rb:392 - Exiting RubyGems with exit_code 1
Exception `Gem::SystemExitException' at uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/user_interaction.rb:392 - Exiting RubyGems with exit_code 1