uvicorn main:app --reload                                                                                        
INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [31274] using watchgod
Traceback (most recent call last):
  File "/home/emadmokhtar/.pyenv/versions/fastapi-pyston/bin/uvicorn", line 8, in <module>
    sys.exit(main())
  File "/home/emadmokhtar/.pyenv/versions/pyston-2.2/envs/fastapi-pyston/lib/pyston3.8/site-packages/click/core.py", line 1137, in __call__
    return self.main(*args, **kwargs)
  File "/home/emadmokhtar/.pyenv/versions/pyston-2.2/envs/fastapi-pyston/lib/pyston3.8/site-packages/click/core.py", line 1062, in main
    rv = self.invoke(ctx)
  File "/home/emadmokhtar/.pyenv/versions/pyston-2.2/envs/fastapi-pyston/lib/pyston3.8/site-packages/click/core.py", line 1404, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/home/emadmokhtar/.pyenv/versions/pyston-2.2/envs/fastapi-pyston/lib/pyston3.8/site-packages/click/core.py", line 763, in invoke
    return __callback(*args, **kwargs)
  File "/home/emadmokhtar/.pyenv/versions/pyston-2.2/envs/fastapi-pyston/lib/pyston3.8/site-packages/uvicorn/main.py", line 371, in main
    run(app, **kwargs)
  File "/home/emadmokhtar/.pyenv/versions/pyston-2.2/envs/fastapi-pyston/lib/pyston3.8/site-packages/uvicorn/main.py", line 388, in run
    ChangeReload(config, target=server.run, sockets=[sock]).run()
  File "/home/emadmokhtar/.pyenv/versions/pyston-2.2/envs/fastapi-pyston/lib/pyston3.8/site-packages/uvicorn/supervisors/basereload.py", line 43, in run
    self.startup()
  File "/home/emadmokhtar/.pyenv/versions/pyston-2.2/envs/fastapi-pyston/lib/pyston3.8/site-packages/uvicorn/supervisors/basereload.py", line 64, in startup
    self.process.start()
  File "/home/emadmokhtar/.pyenv/versions/pyston-2.2/lib/pyston3.8/multiprocessing/process.py", line 121, in start
    self._popen = self._Popen(self)
  File "/home/emadmokhtar/.pyenv/versions/pyston-2.2/lib/pyston3.8/multiprocessing/context.py", line 284, in _Popen
    return Popen(process_obj)
  File "/home/emadmokhtar/.pyenv/versions/pyston-2.2/lib/pyston3.8/multiprocessing/popen_spawn_posix.py", line 32, in __init__
    super().__init__(process_obj)
  File "/home/emadmokhtar/.pyenv/versions/pyston-2.2/lib/pyston3.8/multiprocessing/popen_fork.py", line 19, in __init__
    self._launch(process_obj)
  File "/home/emadmokhtar/.pyenv/versions/pyston-2.2/lib/pyston3.8/multiprocessing/popen_spawn_posix.py", line 39, in _launch
    from . import resource_tracker
  File "/home/emadmokhtar/.pyenv/versions/pyston-2.2/lib/pyston3.8/multiprocessing/resource_tracker.py", line 38, in <module>
    import _posixshmem
ImportError: /home/emadmokhtar/.pyenv/versions/pyston-2.2/lib/pyston3.8/lib-dynload/../../../lib/librt.so.1: undefined symbol: __clock_nanosleep, version GLIBC_PRIVATE