Ums runs on python 3.
$ Install PIP On Debian/Ubuntu sudo apt-get install python3-pip python3-dev
$ Install PIP On Arch sudo pacman -S python-pip
$ sudo pip3 install virtualenvwrapper
$ echo "export VIRTUALENVWRAPPER_PYTHON=/usr/bin/python3" >> ~/.bashrc
$ echo "alias env.activate=\"source /usr/bin/virtualenvwrapper.sh\"" >> ~/.bashrc & source ~/.bashrc
$ env.activate
$ mkvirtualenv --python=$(which python3) --no-site-packages masterstash
$ cd path/to/ums/src
$ pip install -e .