To install UltraNest, run this command in your terminal:
$ pip install ultranest
This is the preferred method to install UltraNest, as it will always install the most recent stable release.
The sources for UltraNest can be downloaded from the Github repo.
You can either clone the public repository:
$ git clone git://github.com/JohannesBuchner/ultranest
Or download the tarball:
$ curl -OJL https://github.com/JohannesBuchner/ultranest/tarball/master
Once you have a copy of the source, you can install it with:
$ python setup.py install