install requirements failed

[ChuckNorrison]

i got some errors while install requirements

First error happened with functools32

Collecting functools32==3.2.3.post2
  Using cached functools32-3.2.3-2.tar.gz (31 kB)
    ERROR: Command errored out with exit status 1:
     command: /usr/bin/python3 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-yqc8irjz/functools32/setup.py'"'"'; __file__='"'"'/tmp/pip-install-yqc8irjz/functools32/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-install-yqc8irjz/functools32/pip-egg-info
         cwd: /tmp/pip-install-yqc8irjz/functools32/
    Complete output (1 lines):
    This backport is for Python 2.7 only.
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

cause functools should already available in my python3, i removed it from requirements.txt

second error happened with subprocess32. got also removed from txt

now it ends up with build error for numpy:

ERROR: Command errored out with exit status 1: /usr/bin/python3 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-7d_b2l4u/numpy/setup.py'"'"'; __file__='"'"'/tmp/pip-install-7d_b2l4u/numpy/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /tmp/pip-record-z0p8x1va/install-record.txt --single-version-externally-managed --user --prefix= --compile --install-headers /home/nice/.local/include/python3.8/numpy Check the logs for full command output.

Iam running Python 3.8.10 on Ubuntu 20.04