"poetry install" fails on windows with demo project and base pyproject.toml

[evenprimes]

---

name: "\U0001F41E Bug Report"
about: Did you find a bug?
title: '"poetry install" fails on windows with demo project and base pyproject.toml'
labels: Bug, Triage
assignees: ''

---

• I am on the latest Poetry version.
• I have searched the issues of this repo and believe that this is not a duplicate.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: Windows 10 v1909 build 18363.836
• Poetry version: 1.0.5 (installed via PowerShell script)
• Python version: 3.7.7 (installed via Windows store)
• Link of a Gist with the contents of your pyproject.toml file: n/a - problem occurs with default pyproject.toml

Issue

After installing and creating a bare demo project, poetry install fails. It looks like
it can't find the sys module.

What I tried

• Uninstalled Python and installed fresh copy with poetry first/only Python module installed
• Tried pip install poetry, same error
• Also tried to install Python 3.8 (also from Windows store), same issue

Other notes

I looked at Virtualenv not always found in case insensitive filesystem, issue #2419, but the paths involved (see below) don't have spaces.

Both the Python 3.7 scripts folder and $home.poetry\bin are in the system path.

This does not seem to be related to the windows rmtree failures previously reported.

Stack trace of failure:

PS C:\Users\didge\Source\poetry-demo> poetry install -vvv
[EnvCommandError]
Command ['C:\\Users\\didge\\AppData\\Local\\pypoetry\\Cache\\virtualenvs\\poetry-demo-2Mh1ooRm-py3.7\\Scripts\\python.exe', '-'] errored with the following return code 1, and output:
The system cannot find the path specified.
input was : import sys

if hasattr(sys, "real_prefix"):
    print(sys.real_prefix)
elif hasattr(sys, "base_prefix"):
    print(sys.base_prefix)
else:
    print(sys.prefix)


Traceback (most recent call last):
  File "C:\Users\didge\.poetry\lib\poetry\_vendor\py3.7\clikit\console_application.py", line 131, in run
    status_code = command.handle(parsed_args, io)
  File "C:\Users\didge\.poetry\lib\poetry\_vendor\py3.7\clikit\api\command\command.py", line 120, in handle
    status_code = self._do_handle(args, io)
  File "C:\Users\didge\.poetry\lib\poetry\_vendor\py3.7\clikit\api\command\command.py", line 163, in _do_handle
    self._dispatcher.dispatch(PRE_HANDLE, event)
  File "C:\Users\didge\.poetry\lib\poetry\_vendor\py3.7\clikit\api\event\event_dispatcher.py", line 22, in dispatch
    self._do_dispatch(listeners, event_name, event)
  File "C:\Users\didge\.poetry\lib\poetry\_vendor\py3.7\clikit\api\event\event_dispatcher.py", line 89, in _do_dispatch
    listener(event, event_name, self)
  File "C:\Users\didge\.poetry\lib\poetry\console\config\application_config.py", line 89, in set_env
    env = env_manager.create_venv(io)
  File "C:\Users\didge\.poetry\lib\poetry\utils\env.py", line 489, in create_venv
    env = self.get(reload=True)
  File "C:\Users\didge\.poetry\lib\poetry\utils\env.py", line 352, in get
    return VirtualEnv(venv)
  File "C:\Users\didge\.poetry\lib\poetry\utils\env.py", line 1022, in __init__
    self._base = Path(self.run('python', '-', input_=GET_BASE_PREFIX).strip())
  File "C:\Users\didge\.poetry\lib\poetry\utils\env.py", line 856, in run
    return self._run(cmd, **kwargs)
  File "C:\Users\didge\.poetry\lib\poetry\utils\env.py", line 1089, in _run
    return super(VirtualEnv, self)._run(cmd, **kwargs)
  File "C:\Users\didge\.poetry\lib\poetry\utils\env.py", line 893, in _run
    raise EnvCommandError(e, input=input_)

[rafaellehmkuhl]

Any news on this one? Same problem here.

Edit: it looks like it has something to do with the python installed by Windows 10 (here and here).

[evenprimes]

I’ve just given up on using poetry for now, at least for projects hosted on windows.

I’m considering trying it on the next project I host on a Pi.

[abn]

@rafaellehmkuhl @evenprimes does this also happen with the latest pre-release?

[rafaellehmkuhl]

@rafaellehmkuhl @evenprimes does this also happen with the latest pre-release?

Didn't try. I'm using the latest stable. There was some change regarding this?

[fcruzel]

I solved this problem by deleting the entire pypoetry folder.

rm -r "C:\Users\<Username>\AppData\Local\pypoetry"

[abn]

This issue could be related to #2651. The original error indicates that instead of the script being passed in as input argument, it was interpreted as a separate command.

This should be resolved in 1.1.0b1.

[Satwikram]

I changed the registry values Autorun in HKEY_CURRENT_USER\Software\Microsoft\Command Processor from
if exists to blank. It worked in my case.

[github-actions]

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