Hi, I am just installing Prefect on my Windows 10 PC and have received the following error. I have tried many things to solve my issue and no luck so far. Would like to get some help on this.... I was running the install

pip install prefect

Building wheels for collected packages: pendulum
  Building wheel for pendulum (PEP 517) ... error
  ERROR: Command errored out with exit status 1:
   command: 'c:\users\zhang\appdata\local\programs\python\python38\python.exe' 'c:\users\zhang\appdata\local\programs\python\python38\lib\site-packages\pip\_vendor\pep517\_in_process.py' build_wheel 'C:\Users\zhang\AppData\Local\Temp\tmpjjs207ax'
       cwd: C:\Users\zhang\AppData\Local\Temp\pip-install-2pd94jc4\pendulum
  Complete output (24 lines):
  Traceback (most recent call last):
    File "setup.py", line 2, in <module>
      from setuptools import setup
  ModuleNotFoundError: No module named 'setuptools'
  Traceback (most recent call last):
    File "c:\users\zhang\appdata\local\programs\python\python38\lib\site-packages\pip\_vendor\pep517\_in_process.py", line 257, in <module>
      main()
    File "c:\users\zhang\appdata\local\programs\python\python38\lib\site-packages\pip\_vendor\pep517\_in_process.py", line 240, in main
      json_out['return_val'] = hook(**hook_input['kwargs'])
    File "c:\users\zhang\appdata\local\programs\python\python38\lib\site-packages\pip\_vendor\pep517\_in_process.py", line 181, in build_wheel
      return _build_backend().build_wheel(wheel_directory, config_settings,
    File "C:\Users\zhang\AppData\Local\Temp\pip-build-env-e3fac8fx\overlay\Lib\site-packages\poetry\core\masonry\api.py", line 57, in build_wheel
      return unicode(WheelBuilder.make_in(poetry, Path(wheel_directory)))
    File "C:\Users\zhang\AppData\Local\Temp\pip-build-env-e3fac8fx\overlay\Lib\site-packages\poetry\core\masonry\builders\wheel.py", line 56, in make_in
      wb.build()
    File "C:\Users\zhang\AppData\Local\Temp\pip-build-env-e3fac8fx\overlay\Lib\site-packages\poetry\core\masonry\builders\wheel.py", line 82, in build
      self._build(zip_file)
    File "C:\Users\zhang\AppData\Local\Temp\pip-build-env-e3fac8fx\overlay\Lib\site-packages\poetry\core\masonry\builders\wheel.py", line 102, in _build
      self._run_build_command(setup)
    File "C:\Users\zhang\AppData\Local\Temp\pip-build-env-e3fac8fx\overlay\Lib\site-packages\poetry\core\masonry\builders\wheel.py", line 130, in _run_build_command
      subprocess.check_call(
    File "c:\users\zhang\appdata\local\programs\python\python38\lib\subprocess.py", line 364, in check_call
      raise CalledProcessError(retcode, cmd)
  subprocess.CalledProcessError: Command '['c:\\users\\zhang\\appdata\\local\\programs\\python\\python38\\python.exe', 'setup.py', 'build', '-b', 'build']' returned non-zero exit status 1.
  ----------------------------------------
  ERROR: Failed building wheel for pendulum
Failed to build pendulum
ERROR: Could not build wheels for pendulum which use PEP 517 and cannot be installed directly

Hi @liren zhang - this is an upstream issue with the

pendulum

package and Windows; check out these issues for some further discussion: https://github.com/sdispater/pendulum/issues?q=is%3Aissue+is%3Aopen+pep+517

Thanks for you response @Chris White. read through the threads and someone had suggested to install pendulum using

pip install pendulum==2.0.3

and this had worked but when go back to

pip install prefect

it was still trying to do the following

Collecting pendulum<3.0,>=2.0.4
  Using cached pendulum-2.1.0.tar.gz (80 kB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
    Preparing wheel metadata ... done

Yea we have other windows users — we support windows and actually have a CI job to run our tests on Windows so this might be something specific about the version of Windows you’re running 🧐

@liren zhang try

pip install pendulum==2.0.4

Thanks a lot for chiming in. I did exactly that after search around for solutions and it worked to install this older version.