[MSNoise] Problem in building the documentation

I follow http://msnoise.org/doc/installation.html#building-this-documentation to try to build the documentation. but when I run "make html", it returns : [cxh@core doc]$ make html sphinx-build -b html -d .build/doctrees . .build/html Traceback (most recent call last): File "/home/cxh/anaconda/bin/sphinx-build", line 9, in <module> load_entry_point('Sphinx==1.2.3', 'console_scripts', 'sphinx-build')() File "/home/cxh/anaconda/lib/python2.7/site-packages/setuptools-5.8-py2.7.egg/pkg_resources.py", line 339, in load_entry_point File "/home/cxh/anaconda/lib/python2.7/site-packages/setuptools-5.8-py2.7.egg/pkg_resources.py", line 2456, in load_entry_point ImportError: Entry point ('console_scripts', 'sphinx-build') not found make: *** [html] error 1 How can I solve this problem? Thanks�&�&j�^r�*�f�x�' �5����]�ׄ^���=�a�&j�^r�*�f�ys���jT���Ǧj)fjv��f�x7����y����Ǧj)fjv��f�y�z+�u��ɭ�j&i����v�f�{_w��6�M�o)��Y���(���>�-~,p��DH�ω�Ӟ�Ӡ�~��z"�隊Y���(���2�� �6�^4�}���4�E �z+�u��]��Mm��(r�\�f�{_vׯ5�^5o+&�������^7��x���HB��t���D�L���|V�5�^��W�k'�+�����ڲ��m�(�P�sm5�O7מ�13�Ơx��㰶�u�m7Ӛ&i��j׌�}5 �6�^4�}y��5�Ak�d�f�-�(r�a�f���(r�&i�����6���ѣ&�9�������|��+�Rǫ���3�YZ���wh��S�U�[�+�}t�$����M5�T�w^���w���C0E^�Ȩ�]�k'�+�����ڲ��m�^}�ޝǬ��i��}׆��Κk�����j)\���]�r�����$���i��}׆��Κk�����j)\���]�r���{^����^��镨�r���