Poetry install command fails - EnvCommandError

• [x ] I am on the latest Poetry version.

• [x ] 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: macOS Catalina 10.15.3

• Poetry version: 1.05

• fish version: 3.1.0

Issue

After checking the toml file with poetry check which was fine. Attempting to install gave the below error. (Note also trying poetry env use 3 gave the same error as does poetry env info. Using python3 works fine and loads the REPL)

[EnvCommandError]
Command ['/Users/yunti/Library/Caches/pypoetry/virtualenvs/switcher5-8hLu6-cI-py3.7/bin/python', '-'] errored with the following return code -6, and output:
dyld: Library not loaded: @executable_path/../Python3
  Referenced from: /Users/yunti/Library/Caches/pypoetry/virtualenvs/switcher5-8hLu6-cI-py3.7/bin/python
  Reason: image not found
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 "/Users/yunti/.poetry/lib/poetry/_vendor/py2.7/clikit/console_application.py", line 131, in run
    status_code = command.handle(parsed_args, io)
  File "/Users/yunti/.poetry/lib/poetry/_vendor/py2.7/clikit/api/command/command.py", line 120, in handle
    status_code = self._do_handle(args, io)
  File "/Users/yunti/.poetry/lib/poetry/_vendor/py2.7/clikit/api/command/command.py", line 163, in _do_handle
    self._dispatcher.dispatch(PRE_HANDLE, event)
  File "/Users/yunti/.poetry/lib/poetry/_vendor/py2.7/clikit/api/event/event_dispatcher.py", line 22, in dispatch
    self._do_dispatch(listeners, event_name, event)
  File "/Users/yunti/.poetry/lib/poetry/_vendor/py2.7/clikit/api/event/event_dispatcher.py", line 89, in _do_dispatch
    listener(event, event_name, self)
  File "/Users/yunti/.poetry/lib/poetry/console/config/application_config.py", line 89, in set_env
    env = env_manager.create_venv(io)
  File "/Users/yunti/.poetry/lib/poetry/utils/env.py", line 657, in create_venv
    return VirtualEnv(venv)
  File "/Users/yunti/.poetry/lib/poetry/utils/env.py", line 1022, in __init__
    self._base = Path(self.run('python', '-', input_=GET_BASE_PREFIX).strip())
  File "/Users/yunti/.poetry/lib/poetry/utils/env.py", line 856, in run
    return self._run(cmd, **kwargs)
  File "/Users/yunti/.poetry/lib/poetry/utils/env.py", line 1089, in _run
    return super(VirtualEnv, self)._run(cmd, **kwargs)
  File "/Users/yunti/.poetry/lib/poetry/utils/env.py", line 893, in _run
    raise EnvCommandError(e, input=input_)

[harit559]

I also encountered this after brew install another package (which updated my python version). I fixed this by

1. rm -rf /Users/(user)/Library/Caches/pypoetry/virtualenvs/yourvirtualenv/
2. poetry install 😀 This should fix your problem

[khanguslee]

I also encountered this after brew install another package (which updated my python version). I fixed this by

1. rm -rf /Users/(user)/Library/Caches/pypoetry/virtualenvs/yourvirtualenv/
2. poetry install 😀 This should fix your problem

Thanks for this! This helped solve my problem after I did a brew update a couple of days ago.