HowTo install rmagick gem on Windows


You need to have the DevKit installed.

Installation of ImageMagick

Download last setup package from and run it.

In the Select Additional Tasks page of the wizard, make sure that both Add application directory to your system path and Install development headers and libraries for C and C++ options are checked:

Note: Both the ImageMagick application directory and the Windows System32 directory contain an executable named "convert.exe". Unless ImageMagick's directory is added the front of the system path, its copy will not be found. This will cause the test suggested at the completion of the installation to fail with a message "Invalid Drive Specification". Also note that Window's copy of "convert.exe" will not be found, if ImageMagick is placed first in the path.

Installation of the rmagick gem

  • open a new command prompt
  • set CPATH and LIBRARY_PATH environment variables to point respectively to ImageMagick installation directory include and lib subdirectories (so the DevKit will find them at build time)

For example:

set CPATH=C:\Program Files\ImageMagick-6.7.7-Q16\include
set LIBRARY_PATH=C:\Program Files\ImageMagick-6.7.7-Q16\lib
  • actually install the gem, e.g. with gem install rmagick or bundle install --without=development test, etc.


rmagick_installation_prompt.jpg (82.4 KB) Etienne Massip, 2012-05-25 13:11

ImageMagick_setup_options.png (37.2 KB) Etienne Massip, 2012-05-25 13:11

redmine_informations.png (6.72 KB) Etienne Massip, 2012-05-25 13:28