Unable to generate HTML document file

[Aakarshak1]

I tried to generate html file using given instruction here :
https://github.com/coala/documentation
and got error

Exception occurred: File "conf.py", line 20, in <module> from coalib.misc.Constants import VERSION ImportError: No module named coalib.misc.Constants The full traceback has been saved in /tmp/sphinx-err-_10BnE.log, if you want to report the issue to the developers. Please also report this if it was a user error, so that a better error message can be provided next time. A bug report can be filed in the tracker at <https://github.com/sphinx-doc/sphinx/issues>. Thanks! Makefile:56: recipe for target 'html' failed make: *** [html] Error 1
OS - linux ubuntu 16.04
any suggestion?

[CaptainDredge]

I think extensions (or modules to document with autodoc) are in another directory.You can add those directories to sys.path in conf.py

[hizkifw]

I'm able to reproduce the problem on a python2 environment. The requirements get installed to python3, but make html defaults to using python2.