python3.10 com numpy - ModuleNotFoundError: Nenhum módulo chamado 'numpy.core._multiarray_umath'

Estou tentando instalar numpy para python3.10 (não em um venv). Eu instalei o python 3.10 usando

sudo apt install python3.10

pip não parecia estar instalado, então eu fiz

jeremy@jeremy-Blade:/$ python3.10 -m pip install numpy
jeremy@jeremy-Blade:/$ wget https://bootstrap.pypa.io/get-pip.py
jeremy@jeremy-Blade:/$ python3.10 get-pip.py
jeremy@jeremy-Blade:/$ python3.10 -m pip --version 
pip 21.3.1 from /home/jeremy/.local/lib/python3.10/site-packages/pip (python 3.10)

e depois tentou

jeremy@jeremy-Blade:/$ python3.10 -m pip install numpy
Defaulting to user installation because normal site-packages is not writeable
Requirement already satisfied: numpy in /usr/lib/python3/dist-packages (1.17.4)

Mas quando tento importar numpy:

Python 3.10.0 (default, Oct  4 2021, 22:09:55) [GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import numpy 
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/numpy/core/__init__.py", line 17, in <module>
    from . import multiarray
  File "/usr/lib/python3/dist-packages/numpy/core/multiarray.py", line 14, in <module>
    from . import overrides
  File "/usr/lib/python3/dist-packages/numpy/core/overrides.py", line 7, in <module>
    from numpy.core._multiarray_umath import (
ModuleNotFoundError: No module named 'numpy.core._multiarray_umath'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3/dist-packages/numpy/__init__.py", line 142, in <module>
    from . import core
  File "/usr/lib/python3/dist-packages/numpy/core/__init__.py", line 47, in <module>
    raise ImportError(msg)
ImportError: 

IMPORTANT: PLEASE READ THIS FOR ADVICE ON HOW TO SOLVE THIS ISSUE!

Importing the numpy c-extensions failed.
- Try uninstalling and reinstalling numpy.
- If you have already done that, then:
  1. Check that you expected to use Python3.10 from "/usr/bin/python3.10",
     and that you have no directories in your PATH or PYTHONPATH that can
     interfere with the Python and numpy version "1.17.4" you're trying to use.
  2. If (1) looks fine, you can open a new issue at
     https://github.com/numpy/numpy/issues.  Please include details on:
     - how you installed Python
     - how you installed numpy
     - your operating system
     - whether or not you have multiple versions of Python installed
     - if you built from source, your compiler versions and ideally a build log
...
Original error was: No module named 'numpy.core._multiarray_umath'

meu caminho é

jeremy@jeremy-Blade:/$env|grep PATH
LD_LIBRARY_PATH=/usr/local/cuda-10.2/targets/x86_64-linux/lib/stubs
PATH=/home/jeremy/.local/bin:/usr/local/cuda-10.2/bin:/usr/local/cuda-10.2/targets/x86_64-linux/lib/stubs:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin

(portanto, PYTHONPATH não está definido - se eu o definir como /usr/bin/python3.10, isso não parece mudar nada), e seguindo as recomendações na mensagem de erro, não vejo nenhum problema aqui. (Eu desinstalei e reinstalei o numpy para python3.10, nenhuma alteração vista no problema) Meu sistema operacional é o Ubuntu 20.04. Desculpe se isso é algo óbvio ou não relacionado ao numpy.