boson install error

gistfile1.txt

Error: Unable to fetch url
Original error: Unable to fetch url
  /home/sane/.rvm/gems/ruby-1.9.2-p136/gems/boson-0.3.2/lib/boson/commands/web_core.rb:55:in `install'
  (eval):5:in `install'
  /home/sane/.rvm/gems/ruby-1.9.2-p136/gems/boson-0.3.2/lib/boson/scientist.rb:85:in `call'
  /home/sane/.rvm/gems/ruby-1.9.2-p136/gems/boson-0.3.2/lib/boson/scientist.rb:85:in `block (2 levels) in redefine_command_block'
  /home/sane/.rvm/gems/ruby-1.9.2-p136/gems/boson-0.3.2/lib/boson/scientist.rb:100:in `call'
  /home/sane/.rvm/gems/ruby-1.9.2-p136/gems/boson-0.3.2/lib/boson/scientist.rb:100:in `call_original_command'
  /home/sane/.rvm/gems/ruby-1.9.2-p136/gems/boson-0.3.2/lib/boson/scientist.rb:108:in `translate_and_render'
  /home/sane/.rvm/gems/ruby-1.9.2-p136/gems/boson-0.3.2/lib/boson/scientist.rb:84:in `block in redefine_command_block'
  /home/sane/.rvm/gems/ruby-1.9.2-p136/gems/boson-0.3.2/lib/boson.rb:87:in `full_invoke'
  /home/sane/.rvm/gems/ruby-1.9.2-p136/gems/boson-0.3.2/lib/boson/runners/bin_runner.rb:157:in `block in execute_command'
  /home/sane/.rvm/gems/ruby-1.9.2-p136/gems/boson-0.3.2/lib/boson/runners/bin_runner.rb:152:in `each'
  /home/sane/.rvm/gems/ruby-1.9.2-p136/gems/boson-0.3.2/lib/boson/runners/bin_runner.rb:152:in `inject'
  /home/sane/.rvm/gems/ruby-1.9.2-p136/gems/boson-0.3.2/lib/boson/runners/bin_runner.rb:152:in `execute_command'
  /home/sane/.rvm/gems/ruby-1.9.2-p136/gems/boson-0.3.2/lib/boson/runners/bin_runner.rb:79:in `start'
  /home/sane/.rvm/gems/ruby-1.9.2-p136/gems/boson-0.3.2/bin/boson:6:in `<top (required)>'
  /home/sane/.rvm/gems/ruby-1.9.2-p136/bin/boson:19:in `load'
  /home/sane/.rvm/gems/ruby-1.9.2-p136/bin/boson:19:in `<main>'
Loaded library core
Loaded library web_core
No libraries indexed