我尝试过输入
gem install passenger
我得到的错误是
Temporarily enhancing PATH to include DevKit...
Building native extensions. This could take a while...
ERROR: Error installing passenger:
ERROR: Failed to build gem native extension.
C:/RailsInstaller/Ruby1.9.3/bin/ruby.exe extconf.rb
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/passenger4.0.17/lib/phusion_passengerrb:177:in `find_location_configuration_file': undefined method `dir' for nil:NilClass (NoMehodError)
from C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/passenger-4.0.17/lib/phuson_passenger.rb:78:in `locate_directories'
from extconf.rb:43:in `<main>'
有什么想法吗？我正在使用ruby 1.9.3
ruby 1.9.3p392 (2013-02-22) [i386-mingw32]