$ conda install --channel https://conda.anaconda.org/menpo opencv3 でエラー

Python 3.x 系の Anaconda 上で OpenCV 3.x を使おうとしたところ、エラーで失敗しました。

下記の様なエラーにはどう対応すれば良いのでしょうか？

$ conda install --channel https://conda.anaconda.org/menpo opencv3


Fetching package metadata .............
Solving package specifications: .

UnsatisfiableError: The following specifications were found to be in conflict:
  - opencv3 -> python 2.7* -> openssl 1.0.1*
  - python 3.6*
Use "conda info <package>" to see the dependencies for each package.