Hello, I am a new PhD student at UCLouvain (Belgium). Trying to install tkwant, I lost a lot of time with an issue I did not understand. For windows users : I suggest you to add "pip install jupyter" As : conda create -n env-tkwant python=3.7 conda activate env-tkwant conda install -c intel mpi4py conda install tkwant -c conda-forge pip install jupyter My problem was that even when activating the virtual environment in cmd, launching "jupyter notebook" did not use the virtual environment because jupyter notebook was not part of it. Thus the python version was kept to 3.8 (uncompatible with the current tkwant package), and I was receiving a "module not found error". Hoping this will be added on your website. Kind regards, Olivier Leblanc