Wrong sys.version_info in setup.py

[timonbimon]

• 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: Mac OS X Mojave
• Poetry version: 0.12.10

Issue

When trying to install ray with poetry add ray the following error gets thrown:

Package operations: 6 installs, 0 updates, 0 removals

  - Installing faulthandler (3.1)

[EnvCommandError]
Command ['/Users/timon/Library/Caches/pypoetry/virtualenvs/hybrid-py3.7/bin/pip', 'install', '--no-deps', 'faulthandler==3.1'] errored with the following output:
Collecting faulthandler==3.1
  Using cached https://files.pythonhosted.org/packages/0f/22/7909e7de4f5ab4d4bfdefc46ccf360ef52db8db1539c948a6402a18d5dfc/faulthandler-3.1.tar.gz
    Complete output from command python setup.py egg_info:
    ERROR: faulthandler is a builtin module since Python 3.3

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/d4/6gfmg7bx1gj69rgx5r4_jm2h0000gn/T/pip-install-uhb7waek/faulthandler/

My project is using Python 3.7.0 and the following line can be found in the setup.py of ray:

if sys.version_info < (3, 0):
    requires.append("faulthandler")

so it seems to me that faulthandler should not have been added to the requirements. any ideas why this is happening would be greatly appreciated! :)

here's my pyproject.toml

[tool.poetry]
name = "project"
version = "0.1.0"

[tool.poetry.dependencies]
python = "^3.7"
Flask = "^1.0"
flask-bcrypt = "^0.7.1"
flask-sqlalchemy = "^2.3"
flask-marshmallow = "^0.9.0"
marshmallow-sqlalchemy = "^0.15.0"
connexion = "^2.0"
environs = "^4.0"
psycopg2 = "^2.7"
gunicorn = "^19.9"
PyJWT = "^1.7"
jsonschema = "^2.6"

[tool.poetry.dev-dependencies]
pytest = "^3.8"
pytest-flask = "^0.14.0"
"testing.postgresql" = "^1.3"

[build-system]
requires = ["poetry>=0.12"]
build-backend = "poetry.masonry.api"

[sdispater]

You should not use if statements to specify Python specific dependencies but rather environment markers which is the recommended way to do so.

[github-actions]

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