gistfile1.txt

Fetching: liquid-2.6.3.gem (100%)
Fetching: kramdown-1.8.0.gem (100%)
Fetching: mercenary-0.3.5.gem (100%)
Fetching: safe_yaml-1.0.4.gem (100%)
Fetching: colorator-0.1.gem (100%)
Fetching: yajl-ruby-1.2.1.gem (100%)
Building native extensions.  This could take a while...
ERROR:  Error installing jekyll:
	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:1:in `<main>'


Gem files will remain installed in /var/lib/gems/1.9.1/gems/yajl-ruby-1.2.1 for inspection.
Results logged to /var/lib/gems/1.9.1/gems/yajl-ruby-1.2.1/ext/yajl/gem_make.out