failed to create anaconda environment ResolvePackageNotFound

The problem is that the Anaconda isn't lying to me. Those packages don't exist in the linux channels however they do exist in the OSX channels. So it is a platform specific problem.

Had this same issue. Solved it by removing both the build versions AND package version (except for necessary package versions such as python=3.6.2 and any others.) The end yml file would look like this in order to be fully cross-platform:

name: testenv
channels:
- esri
- scitools
- obspy
- conda-forge
- defaults
dependencies:
- appnope
- libgfortran
- pip
- python=3.6.2
- wheel
- pip:
  - ipython-genutils
  - jupyter-client==5.1.0
  - jupyter-console
  - jupyter-core
  - prompt-toolkit