# Gem install ruby-serialport gives error

**URL:** <https://www.ruby-forum.com/t/gem-install-ruby-serialport-gives-error/160505>\
**Category:** Ruby\
**Created:** [February 17, 2009, 7:06am UTC](https://www.ruby-forum.com/t/gem-install-ruby-serialport-gives-error/160505 "2009-02-17T07:06:29Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![sangeeta](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/7ba0ec/32.png) [@sangeeta](https://www.ruby-forum.com/u/sangeeta)\
**Post date:** [February 17, 2009, 7:06am UTC](https://www.ruby-forum.com/t/gem-install-ruby-serialport-gives-error/160505/1 "2009-02-17T07:06:29Z")

</div>

:::: gem install ruby-serialport  
Install required dependency echoe? [Yn] Y  
Install required dependency rubyforge? [Yn] Y  
Install required dependency highline? [Yn] Y  
Building native extensions. This could take a while…  
ERROR: While executing gem … (Gem::Installer::ExtensionBuildError)  
ERROR: Failed to build gem native extension.

ruby extconf.rb install ruby-serialport -p  
[http://proxyin03.itg.ti.com:80](http://proxyin03.itg.ti.com:80)  
checking for OS… mswin  
creating Makefile

nmake  
‘nmake’ is not recognized as an internal or external command,  
operable program or batch file.

Gem files will remain installed in  
c:/ruby/lib/ruby/gems/1.8/gems/ruby-serialpor  
t-0.7.0 for inspection.  
Results logged to  
c:/ruby/lib/ruby/gems/1.8/gems/ruby-serialport-0.7.0/ext/gem\_m  
ake.out

i m facing this problem can anyone help me ??