m_lib requires Python2; preferred versions are 2.6 or 2.7. To install the library from sources system-wide run run the following command: sudo python setup.py install -O2 If you don't want to install it system-wide you can install it in your home directory; run run the following command: python setup.py install -O2 --user Option '--user' only available in Python 2.6 or 2.7. The command installs m_lib into $HOME/.local/lib/python2.$VERSION/site-packages/ where python finds it.