ruby on rails - Installing paperclip plugin -

I am trying to install the paperclip plugin with the following command:

  Ruby Install script / plugin git: //github.com/thoughtbot/paperclip.git  

But I'm getting some errors:

  Ruby script / Plugin installed Git: //github.com/thoughtbot/paperclip.git --force svn: '/ home / app / vendor / plugins' is not a working copy /usr/lib/ruby/1.8/open-uri.rb: 32: 'Initialize': Any such file or directory - git: //github.com/thoughtb /usr/lib/ruby/1.8/open-uri.rb from ot / paperclip.git (Errno :: ENOENT): 32: from `open_uri_original_open '/usr/lib/ruby/1.8/open-uri.rb:32 : In 'Open' from ./script/../config/../vendor/rails/railties/lib/commands/plugin.rb: 863: In 'fetch_dir' ./script/../config/../ Vendor / rails / railties / lib / commands / plugin.rb: 857: from 'fetch' in ./script/../config/ ../vendor/rails/railties/lib/commands/plugin.rb:856: IN 'each' from ./script/../config/../vendor/rails/railties/lib/comm Ands / plugin.rb: 856: ./script/../config/../vendor/rails/ Railties / lib / commands / plugin.rbailand19: To get 'from install_using_http' from '`./script/ to ../config/../vendor/rails/railties/lib/commands/plugin.rb:169:IN . Send in ./script/../config/../vendor/rails/railties/lib/commands/plugin.rb:169:IN ./script/../config/../vendor/rails/railties/lib /commands/plugin.rb:734:IN 'Pars!' From 'install' with ./script/../config/../vendor/rails/railties/lib/commands/plugin.rb:732:IN 'Every' from ./script/../config/../ Vendor / rails / raillet / lib / command / plugin RB: 732: In 'Pars'! From ./script/../config/../vendor/rails/railties/lib/commands/plugin.rb:447:in 'Pars!' From ./script/../config/../vendor/rails/railties/lib/commands/plugin.rb:463:in 'Pars!' From script / plugin ./script/../config/../vendor/rails/railties/lib/commands/plugin.rb:871 to: 3: `Required 'from script / plugin: 3  

Is this because I am using an old rail version?