Windows Vista, Ruby v. 3.3.5
C:\\>gem install rmagick Building native extensions. This could take a while... ERROR: Error installing rmagick:
Download this rmagick-2.13.2.gem gem and save in you local.
Open the repository in cmd prompt where the gem file is located and run the following cmd
gem install rmagick-2.13.2.gem --platform=ruby --with-opt-lib=C:/ImageMagick-6.6.7-Q16/lib --with-opt-include=c:/ImageMagick-6.6.7-Q16/include