# Problem install rmagick

**URL:** <https://www.ruby-forum.com/t/problem-install-rmagick/167615>\
**Category:** Ruby\
**Created:** [May 10, 2009, 10:20am UTC](https://www.ruby-forum.com/t/problem-install-rmagick/167615 "2009-05-10T10:20:50Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![giga](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/b9bd4f/32.png) [@giga](https://www.ruby-forum.com/u/giga)\
**Post date:** [May 10, 2009, 10:20am UTC](https://www.ruby-forum.com/t/problem-install-rmagick/167615/1 "2009-05-10T10:20:50Z")

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# gem1.8 install rmagick works fine, but:

# gem1.9 install rmagick

Building native extensions. This could take a while…  
ERROR: Error installing rmagick:  
ERROR: Failed to build gem native extension.

/usr/bin/ruby1.9 extconf.rb install rmagick  
extconf.rb:1:in `require': no such file to load -- mkmf (LoadError) from extconf.rb:1:in`’

Gem files will remain installed in  
/var/lib/gems/1.9.0/gems/rmagick-2.9.1 for inspection.  
Results logged to  
/var/lib/gems/1.9.0/gems/rmagick-2.9.1/ext/RMagick/gem\_make.out

---

<div class="post-metadata">

**Author:** ![giga](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/b9bd4f/32.png) [@giga](https://www.ruby-forum.com/u/giga)\
**Post date:** [May 10, 2009, 2:55pm UTC](https://www.ruby-forum.com/t/problem-install-rmagick/167615/2 "2009-05-10T14:55:21Z")

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Fresh M. wrote:

> Gem files will remain installed in  
> /var/lib/gems/1.9.0/gems/rmagick-2.9.1 for inspection.  
> Results logged to  
> /var/lib/gems/1.9.0/gems/rmagick-2.9.1/ext/RMagick/gem\_make.out

mkmf.rb is part of the standard library in Ruby. Either you don’t have  
it installed or it’s not in Ruby’s library path. How did you install  
Ruby 1.9?