# A problem with mongrel install

**URL:** <https://www.ruby-forum.com/t/a-problem-with-mongrel-install/68948>\
**Category:** Ruby\
**Created:** [September 17, 2006, 4:55am UTC](https://www.ruby-forum.com/t/a-problem-with-mongrel-install/68948 "2006-09-17T04:55:23Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![SSSSSSS\_SSS\_SSSSS\_S](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/f6c823/32.png) [@SSSSSSS\_SSS\_SSSSS\_S](https://www.ruby-forum.com/u/SSSSSSS_SSS_SSSSS_S)\
**Post date:** [September 17, 2006, 4:55am UTC](https://www.ruby-forum.com/t/a-problem-with-mongrel-install/68948/1 "2006-09-17T04:55:23Z")

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hi all:  
when i install mongrel

Building native extensions. This could take a while…  
extconf.rb:1:in `require’: no such file to load – mkmf (LoadError)  
from extconf.rb:1

ERROR: Error installing gem mongrel-0.3.13.3.gem[.gem]: ERROR: Failed  
to build gem native extension.  
Gem files will remain installed in  
/usr/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3 for inspection.

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**Author:** ![SSSSSSS\_SSS\_SSSSS\_S](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/f6c823/32.png) [@SSSSSSS\_SSS\_SSSSS\_S](https://www.ruby-forum.com/u/SSSSSSS_SSS_SSSSS_S)\
**Post date:** [September 17, 2006, 5:13am UTC](https://www.ruby-forum.com/t/a-problem-with-mongrel-install/68948/2 "2006-09-17T05:13:24Z")

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On 9/16/06, ¸»Àö±ý¸É [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> /usr/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3 for inspection.  
> Are you on Debian or something equally hostile to Ruby?

Make sure you’ve installed ruby-dev or its equivalent.

-austin