• 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: Ubuntu 20.04
• Poetry version: 1.1.2 & 1.0.10
• pyproject.toml

[tool.poetry]
name = "testpoetry-pywin32"
version = "0.1.0"
description = ""
authors = []

[tool.poetry.dependencies]
python = "~3.8"
azureml-widgets = "1.15.0"
azureml-dataset-runtime = "^1.15.0"

[tool.poetry.dev-dependencies]

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

Issue

run poetry lock then poetry export --without-hashes

version 1.0.10

pywin32==228; sys_platform == "win32" and python_version >= "3.6" or platform_system == "Windows" or sys_platform == "win32"

version 1.1.0 & above

pywin32==228
pywin32==228; platform_system == "Windows"
pywin32==228; sys_platform == "win32"