Ruby: Cannot Install Watir Gem On Windows

Question

Watir\'s site says I need Ruby 1.8.6, which I\'m running. And windows installation should be as simple as gem install watir. But when I run that, I get this:

Answer 1

Execute Below command and its works

gem install watir --platform=mswin32

Answer 2

Installed devkit and after calling the bat file on Windows 7 from a cmd it fixed this issue. Using Ruby 1.9.1

Answer 3

Turns out I needed to install the Ruby Development files. =/

Answer 4

I also had to install nokogiri to get Watir to install successfully on windows, after installing DevKit. Use: gem install nokogiri

Answer 5

I would recommend you install the RubyInstaller Development Kit as documented here

Once you've installed it, the compile process of Watir dependencies (win32-api) will install successfully.