try typing these two commands sudo apt-get install build-essential sudo apt-get install ruby1.8-dev this should give you the mkmf.rb file in the proper location then you can use the extconf.rb for installing the ruby-mysql module On Nov 11, 2007, at 4:32 PM, Peter Vanderhaden wrote: > Kristopher, > I'm running Ubuntu 7.04 > PV > > Windham, Kristopher R. wrote: >> Peter, >> what os are you running? >> >> sounds like you need to install the ruby1.8-dev package >> should be something simple like >> >> apt-get install ruby1.8-dev >> >> >> http://rubyforge.org/forum/forum.php?thread_id=4161&forum_id=4050 > > -- > Posted via http://www.ruby-forum.com/. >