Question: I am using Pipenv to manage project dependencies. It was working fine so far until now. Now I am trying to bootstrap an environment with pipenv install and I am getting the following error: ❯ pipenv install --dev --skip-lock Creating a virtualenv for this project… Pipfile: /Users/user/project/Pipfile Using /usr/bin/python3 (3.7.3) to create virtualenv… ⠧ Creating virtual environment...created virtual environment CPython3.7.3.final.0-64 in 399ms creator CPython3Posix(dest=/Users/user/.local/share/virtualenvs/sql_runner-ABIm84c6, clear=False, global=False) seeder FromAppData(download=False, pip=latest, setuptools=latest, wheel=latest, via=copy, app_data_dir=/Users/user/Library/Application Support/virtualenv/seed-app-data/v1) activators BashActivator,CShellActivator,FishActivator,PowerShellActivator,PythonActivator,XonshActivator ✔ Successfully created virtual environment! Virtualenv location: /Users/user/.local/share/virtualenvs/sql_runner-ABIm84c6 Traceback (most recent call last): File "/usr/local/Cellar/pipenv/2018.11.26_4/libexec/bin/pipenv", line 8, in <module> sys.exit(cli()) File "/usr/local/Cellar/pipenv/2018.11.26_4/libexec/lib/python3.8/site-packages/pipenv/vendor/click/core.py", line 764, in __call__ return self.main(*args, **kwargs) File "/usr/local/Cellar/pipenv/2018.11.26_4/libexec/lib/python3.8/site-packages/pipenv/vendor/click/core.py", line 717, in main rv = self.invoke(ctx) File "/usr/local/Cellar/pipenv/2018.11.26_4/libexec/lib/python3.8/site-packages/pipenv/vendor/click/core.py", line 1137, in invoke return _process_result(sub_ctx.command.invoke(sub_ctx)) File "/usr/local/Cellar/pipenv/2018.11.26_4/libexec/lib/python3.8/site-packages/pipenv/vendor/click/core.py", line 956, in invoke return ctx.invoke(self.callback, **ctx.params) File "/usr/local/Cellar/pipenv/2018.11.26_4/libexec/lib/python3.8/site-packages/pipenv/vendor/click/core.py", line 555, in invoke return callback(*args, **kwargs) File "/usr/local/Cellar/pipenv/2018.11.26_4/libexec/lib/python3.8/site-packages/pipenv/vendor/click/decorators.py", line 64, in new_func return ctx.invoke(f, obj, *args, **kwargs) File "/usr/local/Cellar/pipenv/2018.11.26_4/libexec/lib/python3.8/site-packages/pipenv/vendor/click/core.py", line 555, in invoke return callback(*args, **kwargs) File "/usr/local/Cellar/pipenv/2018.11.26_4/libexec/lib/python3.8/site-packages/pipenv/vendor/click/decorators.py", line 17, in new_func return f(get_current_context(), *args, **kwargs) File "/usr/local/Cellar/pipenv/2018.11.26_4/libexec/lib/python3.8/site-packages/pipenv/cli/command.py", line 235, in install retcode = do_install( File "/usr/local/Cellar/pipenv/2018.11.26_4/libexec/lib/python3.8/site-packages/pipenv/core.py", line 1734, in do_install ensure_project( File "/usr/local/Cellar/pipenv/2018.11.26_4/libexec/lib/python3.8/site-packages/pipenv/core.py", line 579, in ensure_project path_to_python = which("python") or which("py") File "/usr/local/Cellar/pipenv/2018.11.26_4/libexec/lib/python3.8/site-packages/pipenv/core.py", line 108, in which raise RuntimeError("location not created nor specified") RuntimeError: location not created nor specified  The Pipfile is the following [[source]] name = "pypi" url = "https://pypi.org/simple" verify_ssl = true [dev-packages] pytest = "==4.6.3" flake8 = "==3.7.7" autopep8 = "==1.4.4" pytest-cov = "==2.7.1" moto = "==1.3.13" Sphinx = "==2.3.1" [packages] psycopg2-binary = "==2.8.2" boto3 = "==1.9.166" pymongo = "==3.8.0" deprecated = "==1.2.5" paramiko = "==2.6.0" pandas = "==0.24.2" pyarrow = "==0.14.0" SQLAlchemy = "==1.3.15" s3fs = "==0.4.0" [requires] python_version = "3.7"  I have installed Pipenv with Homebrew. I am not sure what could have changed to stop working. Other older projects keep working, but every time that I try to create an environment I get this error. Thanks!

Answer: So I manage to make it work. My default python system installation was 3.7.3. However, pipenv didn't like that one for some reason. I installed python 3.7.7 with homebrew and pipenv was able to locate that version properly and use it to create a virtual environment. In summary, to fix this issue try to install python again. In my case: brew install python