python setup.py build_ext --inplace bug

python setup.py build_ext --inplace
fatal: not a git repository (or any of the parent directories): .git
/home/xxx/.conda/envs/graphormer/lib/python3.9/site-packages/setuptools/init.py:84: _DeprecatedInstaller: setuptools.installer and fetch_build_eggs are deprecated.
!!

    ********************************************************************************
    Requirements should be satisfied by a PEP 517 installer.
    If you are using pip, you can try `pip install --use-pep517`.
    ********************************************************************************

!!
dist.fetch_build_eggs(dist.setup_requires)
running build_ext
/home/xxx/.conda/envs/graphormer/lib/python3.9/site-packages/torch/utils/cpp_extension.py:370: UserWarning: Attempted to use ninja as the BuildExtension backend but we could not find ninja.. Falling back to using the slow distutils backend.
warnings.warn(msg.format('we could not find ninja.'))
skipping 'fairseq/data/data_utils_fast.cpp' Cython extension (up-to-date)
skipping 'fairseq/data/token_block_utils_fast.cpp' Cython extension (up-to-date)

Reproduce the reported python setup.py build_ext --inplace command from the repository and inspect setup.py, along with the mentioned fairseq/data/data_utils_fast.cpp and fairseq/data/token_block_utils_fast.cpp extensions. Check whether the command actually fails after the warnings and skipped extensions; the issue needs a defined successful build result before completion can be verified.