readthedocs.org: Conda build not working with python 3.6

Details

I am trying to build my python 3.6 only project’s documentation using a conda environment. However, this fails because the package requirements are not satisfiable for 3.6. Locally my docs build fine with python 3.6. Not sure if that is because the package python versions are not updated on conda or because of the hardcoded version for some of the packages.

• Project URL: http://readthedocs.org/projects/multiset/
• Build URL: http://readthedocs.org/projects/multiset/builds/4880183/
• environment.yml: https://github.com/wheerd/multiset/blob/master/environment.yml
• Read the Docs username: Wheerd

Actual Result

Conda cannot find a working constallation for python 3.6:

The following specifications were found to be in conflict:
  - alabaster >=0.7,<0.8,!=0.7.5 -> python 2.7*|3.4*|3.5*
  - certifi (target=certifi-2016.9.26-py36_0.tar.bz2) -> python 2.6*|2.7*|3.3*|3.4*|3.5*|3.6*
  - docutils ==0.12 -> python 2.7*|3.4*|3.5*
  - mock -> python 2.7*|3.4*|3.5*
  - pillow ==3.0.0 -> python 2.7*|3.4*|3.5*
  - pip (target=pip-9.0.1-py36_1.tar.bz2) -> python 2.7*|3.4*|3.5*
  - pip (target=pip-9.0.1-py36_1.tar.bz2) -> setuptools
  - pygments ==2.1.1 -> python 2.7*|3.4*|3.5*
  - python 3.6*
  - setuptools (target=setuptools-32.3.1-py36_0.tar.bz2) -> certifi
  - setuptools (target=setuptools-32.3.1-py36_0.tar.bz2) -> python 2.6*|2.7*|3.3*|3.4*|3.5*|3.6*
  - sphinx ==1.3.5 -> python 2.7*|3.4*|3.5*
  - sphinx_rtd_theme ==0.1.7 -> python 2.7*|3.4*|3.5*
  - wheel (target=wheel-0.29.0-py36_0.tar.bz2) -> python 2.7*|3.3*|3.4*|3.5*|3.6*