Install libyaml $ wget http://pyyaml.org/download/libyaml/yaml-0.1.4.tar.gz $ tar zxf yaml-0.1.4.tar.gz $ cd yaml-0.1.4 $ ./configure $ make $ sudo make install Reinstall ruby-2.0.0 $ rvm reinstall ruby-2.0.0 --autolibs=enable