According to the Python documentation:
It appears like your setuptools are not installed. Just follow the Installation Instructions from the PyPI website.
If it's already installed, try
pip install --upgrade setuptools
If it's already up to date, just check that the module ez_setup is not missing. If it is missing, then do:
pip install ez_setup
Then try again
pip install unroll
If it's still not working, there may be a possibility that pip didn't install/upgrade setup_tools properly so you might want to try
easy_install -U setuptools
And again
pip install unroll
You can see the following video tutorial to clear all your doubts:-