pipenv install --python 这一步一直报错是为什么

pipenv install --python  ~/anaconda3/envs/python36/bin/python3.6
Warning: Python  ~/anaconda3/envs/python36/bin/python3.6 was not found on your system…
Neither 'pyenv' nor 'asdf' could be found to install Python.
You can specify specific versions of Python with:
$ pipenv --python path/to/python
