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  1. PObcrypt-ruby gem Gem::Installer::ExtensionBuildError:
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    copied!<p>Good day. I'm trying to set up project that's beings worked on by other people.<br> when i run <code>bundle install</code> it crashes with an error </p> <pre><code>Installing bcrypt-ruby (3.0.1) with native extensions Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension. /usr/bin/ruby1.9.1 extconf.rb /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- mkmf (LoadError) from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require' from extconf.rb:36:in `&lt;main&gt;' Gem files will remain installed in /home/halfros/.bundler/tmp/9279/gems/bcrypt-ruby-3.0.1 for inspection. Results logged to /home/halfros/.bundler/tmp/9279/gems/bcrypt-ruby-3.0.1/ext/mri/gem_make.out An error occurred while installing bcrypt-ruby (3.0.1), and Bundler cannot continue. Make sure that `gem install bcrypt-ruby -v '3.0.1'` succeeds before bundling. </code></pre> <p><strong>sudo gem install bcrypt-ruby -v '3.0.1'</strong> </p> <pre><code>$ sudo gem install bcrypt-ruby -v '3.0.1' Building native extensions. This could take a while... ERROR: Error installing bcrypt-ruby: ERROR: Failed to build gem native extension. /usr/bin/ruby1.9.1 extconf.rb /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- mkmf (LoadError) from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require' from extconf.rb:36:in `&lt;main&gt;' Gem files will remain installed in /var/lib/gems/1.9.1/gems/bcrypt-ruby-3.0.1 for inspection. Results logged to /var/lib/gems/1.9.1/gems/bcrypt-ruby-3.0.1/ext/mri/gem_make.out </code></pre> <p>Tried ths - no changes.<br> <a href="http://rorguide.blogspot.com/2011/02/bundle-install-on-linux-giving-error.html" rel="nofollow">http://rorguide.blogspot.com/2011/02/bundle-install-on-linux-giving-error.html</a></p>
 

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