Yet another cross platform dependency bug

[corby]

Description

PySide6 released a MacOS ONY patch for 6.8.1.1
I'm on a linux machine (Ubunut)
My dependency is
pyside6 = '^6.8'

When dong a poetry update the update fails because it can't find a 6.8.1.1. patch for linux when it sees the mac file.

Workarround:

pyside6 = [
    { version = "^6.8.1.1", markers = "sys_platform == 'macos'" },
    { version = "6.8.1", markers = "sys_platform == 'win32'" },
    { version = "6.8.1", markers = "sys_platform == 'linux'" },
]

Example:

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

[tool.poetry]
name = "test"
version = "0.1.0"
description = ""
authors = [""]
readme = ""
packages = [
    { include = "test", from = "src" }
]

[tool.poetry.dependencies]
python = ">=3.10,<3.14"
pyside6 = "^6.8"

Loading configuration file /home/****/.config/pypoetry/config.toml
Using virtualenv: /home/****/venvs/****/desktop
Updating dependencies
Resolving dependencies...
   1: fact: test is 0.1.0
   1: derived: test
   1: fact: test depends on pyside6 (^6.8)
   1: selecting test (0.1.0)
   1: derived: pyside6 (>=6.8,<7.0)
Checking if keyring is available
Backend 'null Keyring' is not suitable
No valid keyring backend was found
Creating new session for pypi.org
Source (PyPI): 5 packages found for pyside6 >=6.8,<7.0
   1: fact: pyside6 (6.8.1.1) depends on shiboken6 (6.8.1.1)
   1: fact: pyside6 (6.8.1.1) depends on PySide6-Essentials (6.8.1.1)
   1: fact: pyside6 (6.8.1.1) depends on PySide6-Addons (6.8.1.1)
   1: selecting pyside6 (6.8.1.1)
   1: derived: PySide6-Addons (==6.8.1.1)
   1: derived: PySide6-Essentials (==6.8.1.1)
   1: derived: shiboken6 (==6.8.1.1)
Source (PyPI): 1 packages found for pyside6-addons 6.8.1.1
Source (PyPI): 1 packages found for pyside6-essentials 6.8.1.1
Source (PyPI): 1 packages found for shiboken6 6.8.1.1
   1: fact: pyside6-addons (6.8.1.1) depends on shiboken6 (6.8.1.1)
   1: fact: pyside6-addons (6.8.1.1) depends on PySide6-Essentials (6.8.1.1)
   1: selecting pyside6-addons (6.8.1.1)
   1: fact: pyside6-essentials (6.8.1.1) depends on shiboken6 (6.8.1.1)
   1: selecting pyside6-essentials (6.8.1.1)
   1: selecting shiboken6 (6.8.1.1)
   1: Version solving took 0.040 seconds.
   1: Tried 1 solutions.

Finding the necessary packages for the current system
Source (PyPI): 1 packages found for pyside6 >=6.8,<7.0
Source (PyPI): 1 packages found for pyside6-addons 6.8.1.1
Source (PyPI): 1 packages found for pyside6-essentials 6.8.1.1
Source (PyPI): 1 packages found for shiboken6 6.8.1.1

Package operations: 0 installs, 4 updates, 0 removals

  - Updating shiboken6 (6.8.1 -> 6.8.1.1): Pending...
Skipping wheel shiboken6-6.8.1.1-cp39-abi3-macosx_12_0_universal2.whl as this is not supported by the current environment
  - Updating shiboken6 (6.8.1 -> 6.8.1.1): Failed

  Stack trace:

  6  ~/venvs/****/desktop/lib/python3.13/site-packages/poetry/installation/executor.py:285 in _execute_operation
      283│ 
      284│             try:
    → 285│                 result = self._do_execute_operation(operation)
      286│             except EnvCommandError as e:
      287│                 if e.e.returncode == -2:

  5  ~/venvs/****/desktop/lib/python3.13/site-packages/poetry/installation/executor.py:395 in _do_execute_operation
      393│             return 0
      394│ 
    → 395│         result: int = getattr(self, f"_execute_{method}")(operation)
      396│ 
      397│         if result != 0:

  4  ~/venvs/****/desktop/lib/python3.13/site-packages/poetry/installation/executor.py:527 in _execute_update
      525│ 
      526│     def _execute_update(self, operation: Install | Update) -> int:
    → 527│         status_code = self._update(operation)
      528│ 
      529│         self._save_url_reference(operation)

  3  ~/venvs/****/desktop/lib/python3.13/site-packages/poetry/installation/executor.py:586 in _update
      584│ 
      585│     def _update(self, operation: Install | Update) -> int:
    → 586│         return self._install(operation)
      587│ 
      588│     def _remove(self, package: Package) -> int:

  2  ~/venvs/****/desktop/lib/python3.13/site-packages/poetry/installation/executor.py:558 in _install
      556│             archive = self._download_link(operation, Link(package.source_url))
      557│         else:
    → 558│             archive = self._download(operation)
      559│ 
      560│         operation_message = self.get_operation_message(operation)

  1  ~/venvs/****/desktop/lib/python3.13/site-packages/poetry/installation/executor.py:736 in _download
      734│ 
      735│     def _download(self, operation: Install | Update) -> Path:
    → 736│         link = self._chooser.choose_for(operation.package)
      737│ 
      738│         if link.yanked:

  RuntimeError

  Unable to find installation candidates for shiboken6 (6.8.1.1)

  at ~/venvs/****/desktop/lib/python3.13/site-packages/poetry/installation/chooser.py:74 in choose_for
       70│ 
       71│             links.append(link)
       72│ 
       73│         if not links:
    →  74│             raise RuntimeError(f"Unable to find installation candidates for {package}")
       75│ 
       76│         # Get the best link
       77│         chosen = max(links, key=lambda link: self._sort_key(package, link))
       78│ 

Cannot install shiboken6.

[dimbleby]

needs reporting to pyside, not here

[alexdewar]

Any luck fixing this? I'm having the same issue.

[dimbleby]

needs reporting to pyside, not here

[abn]

Agreed. Poetry is working as expected here. Poetry does not try to lock a dependency on different versions based on platform availability unless explicitly told to do so. It selects the latest applicable version based on the provided constraints.

You can either do what the workaround suggests, or alternatively exclude the bad version altogether.

[alexdewar]

What workaround?

[abn]

@alexdewar please see issue description.