Can't install "testfixtures"

Dear All, I’m trying to install from the Git Repo. I cloned the repo and cd into it. Then did:

“conda env update” or even “conda env create -f environment.yml”

But in both cases I get the error message:


  • testfixtures

My computer is Fedora Linux 28, I have Python installed but never used conda, actually I have almost no experience with Python.

Thanks for any help!