Can not import numfig and natbib

[shivams]

I am running sphinx v1.2.3 and after downloading the github repo of this project, I went ahead and did make html. However, this import error was shown due to numfig:

Running Sphinx v1.2.3
Extension error:
Could not import extension numfig (exception: cannot import name OrderedDict)
make: *** [html] Error 1

I commented out the numfig extension, but then this error was shown due to natbib:

Running Sphinx v1.2.3
Extension error:
Could not import extension natbib (exception: cannot import name Set)
make: *** [html] Error 1

[borisalmonacid]

➜ sphinxtr-master 5 make html
touch bibliography.rst && sphinx-build -a -b html -d _build/doctrees . _build/html
Running Sphinx v1.7.4

Extension error:
Could not import extension numfig (exception: cannot import name 'Directive')
make: *** [html] Error 2
➜ sphinxtr-master 5