SolverProblemError with multiple constraints and path dependencies #3639

Using virtualenv: D:\***\.venv
Updating dependencies
Resolving dependencies...
   1: fact: fokr is 0.1.0
   1: derived: fokr
   0: Duplicate dependencies for pyproj
   1: fact: fokr depends on pyproj (2.6.0 .python\pyproj-2.6.0-cp38-cp38-win_amd64.whl)
   1: fact: fokr depends on pyproj (3.0.0.post1 .python\pyproj-3.0.0.post1-cp39-cp39-win_amd64.whl)
   1: selecting fokr (0.1.0)
   1: derived: pyproj (3.0.0.post1 .python\pyproj-3.0.0.post1-cp39-cp39-win_amd64.whl)
   1: conflict: fokr depends on pyproj (2.6.0 .python\pyproj-2.6.0-cp38-cp38-win_amd64.whl)
   1: ! not pyproj (2.6.0 .python\pyproj-2.6.0-cp38-cp38-win_amd64.whl) is satisfied by pyproj (3.0.0.post1 .python\pyproj-3.0.0.post1-cp39-cp39-win_amd64.whl)
   1: ! which is caused by "fokr depends on pyproj (3.0.0.post1 .python\pyproj-3.0.0.post1-cp39-cp39-win_amd64.whl)"
   1: ! thus: version solving failed
   1: Version solving took 0.217 seconds.
   1: Tried 1 solutions.

  Stack trace:

  8  d:\***\.python\python\lib\site-packages\clikit\console_application.py:131 in run
      129│             parsed_args = resolved_command.args
      130│
    → 131│             status_code = command.handle(parsed_args, io)
      132│         except KeyboardInterrupt:
      133│             status_code = 1

  7  d:\***\.python\python\lib\site-packages\clikit\api\command\command.py:120 in handle
      118│     def handle(self, args, io):  # type: (Args, IO) -> int
      119│         try:
    → 120│             status_code = self._do_handle(args, io)
      121│         except KeyboardInterrupt:
      122│             if io.is_debug():

  6  d:\***\.python\python\lib\site-packages\clikit\api\command\command.py:171 in _do_handle
      169│         handler_method = self._config.handler_method
      170│
    → 171│         return getattr(handler, handler_method)(args, io, self)
      172│
      173│     def __repr__(self):  # type: () -> str

  5  d:\***\.python\python\lib\site-packages\cleo\commands\command.py:92 in wrap_handle
       90│         self._command = command
       91│
    →  92│         return self.handle()
       93│
       94│     def handle(self):  # type: () -> Optional[int]

  4  d:\***\.python\python\lib\site-packages\poetry\console\commands\install.py:71 in handle
       69│         self._installer.verbose(self._io.is_verbose())
       70│
    →  71│         return_code = self._installer.run()
       72│ 
       73│         if return_code != 0:

  3  d:\***\.python\python\lib\site-packages\poetry\installation\installer.py:103 in run
      101│         local_repo = Repository()
      102│
    → 103│         return self._do_install(local_repo)
      104│
      105│     def dry_run(self, dry_run=True):  # type: (bool) -> Installer

  2  d:\***\.python\python\lib\site-packages\poetry\installation\installer.py:235 in _do_install
      233│             )
      234│ 
    → 235│             ops = solver.solve(use_latest=self._whitelist)
      236│         else:
      237│             self._io.write_line("Installing dependencies from lock file")

  1  d:\***\.python\python\lib\site-packages\poetry\puzzle\solver.py:65 in solve
       63│         with self._provider.progress():
       64│             start = time.time()
    →  65│             packages, depths = self._solve(use_latest=use_latest)
       66│             end = time.time()
       67│

  SolverProblemError

  Because fokr depends on both pyproj (2.6.0 .python\pyproj-2.6.0-cp38-cp38-win_amd64.whl) and pyproj (3.0.0.post1 .python\pyproj-3.0.0.post1-cp39-cp39-win_amd64.whl), version solving failed.

  at d:\***\.python\python\lib\site-packages\poetry\puzzle\solver.py:241 in _solve
      237│             packages = result.packages
      238│         except OverrideNeeded as e:
      239│             return self.solve_in_compatibility_mode(e.overrides, use_latest=use_latest)
      240│         except SolveFailure as e:
    → 241│             raise SolverProblemError(e)
      242│
      243│         results = dict(
      244│             depth_first_search(
      245│                 PackageNode(self._package, packages), aggregate_package_nodes