title: failed to create anaconda environment ResolvePackageNotFound
body: <p>I've been trying to use this yml file to create an environment (I created the yml):</p>
  
  <pre><code>name: testenv
  channels:
  - esri
  - scitools
  - obspy
  - conda-forge
  - defaults
  dependencies:
  - appnope=0.1.0=py36_0
  - libgfortran=3.0.0=0
  - pip=9.0.1=py36_0
  - python=3.6.2=0
  - wheel=0.30.0=py_1
  - pip:
    - ipython-genutils==0.2.0
    - jupyter-client==5.1.0
    - jupyter-console==5.1.0
    - jupyter-core==4.3.0
    - prompt-toolkit==1.0.15
  </code></pre>
  
  <p>however it always fails with the following error message:</p>
  
  <pre><code>Using Anaconda API: https://api.anaconda.org
  Solving environment: failed
  
  ResolvePackageNotFound:
    - wheel==0.30.0=py_1
    - appnope==0.1.0=py36_0
  </code></pre>
  
  <p>Is it searching the wrong channels for it? I can find these packages if I simply install them in the base conda install. Thanks for your help.</p>