Why no installation for local machine?

My installation steps:

refer to : How to set up Windows 10 for fast.ai

  1. install nvidia gpu drivers windows
    https://www.nvidia.com/Download/index.aspx?lang=en-us

  2. Install Anaconda (Python 3.6) using the 64-bit graphical installer(https://www.anaconda.com/download/?lang=en-us#download).
    Choose the option to install for “this user only”

  3. Install Git for Windows

https://git-scm.com/book/en/v2/Getting-Started-Installing-Git

  1. Run Anaconda Prompt from your start menu, and type:
    git clone https://github.com/fastai/fastai.git

  2. Once the repo is cloned, you’re ready to set up fastai:
    cd fastai
    conda env create -f environment.yml
    activate fastai

  3. open jupyter:
    (fastai)> jupyter notebook

When I import fastai. It says “no module fastai”