I'm trying to install this library using the command given below: ``` pip install git+https://github.com/django-nonrel/django@nonrel-1.5 ``` but It gets stuck on this ``` Collecting git+https://github.com/django-nonrel/django@nonrel-1.5 Cloning https://github.com/django-nonrel/django (to nonrel-1.5) to /var/folders/wn/klm7h6757yj5lj60zdk7w2bw0000gn/T/pip-90prjk0m-build ```