First, create a fresh environment.

conda create -y -n eyelink python=3.6
source activate eyelink
pip install git+https://github.com/grero/pylinkwrapper

Prior to installing the package, the pylink package should be copied from the Eyelink directory to the site-packages directory of the eyelink environment. On a macOS, this could be

cp -r  /Applications/Eyelink/pylink/pylink3.6 ~/anaconda/envs/eyelink/lib/python3.6/site-packages/pylink

Then, we can go ahead and install the package using pip:

pip install git+https://github.com/grero/EyelinkCalibration

After the installation step, the EyelinkCalibration app should be added to your system and you should be able to automatically run it. On macOS, simply type in EyelinkCalibration from the command line, making sure that you are in the eyelink environment.