Build fails using python3 and pip3 on Arch Linux

[ghost]

Describe the bug
Build fails on Arch Linux.

$ pip3 --version
pip 20.3.4 from /usr/lib/python3.10/site-packages/pip (python 3.10)
$ python --version
Python 3.10.1
$ python -c "import struct;print( 8 * struct.calcsize('P'))"
64

To Reproduce
Install Arch Linux (e.g., in a VM), then:

rm -rf $HOME/temp
mkdir $HOME/temp
cd $HOME/temp
git clone https://github.com/tribler/tribler --recursive
pip3 install --upgrade -r tribler/src/requirements.txt

Expected
Build succeeds.

Actual
Build fails:

Collecting pony==0.7.14
  Using cached pony-0.7.14.tar.gz (290 kB)
    ERROR: Command errored out with exit status 1:
     command: /usr/bin/python -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-c84xx8ku/pony_19e84ef4c3814a94bac462a6b845406f/setup.py'"'"'; __file__='"'"'/tmp/pip-install-c84xx8ku/pony_19e84ef4c3814a94bac462a6b845406f/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.rea
d().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-pip-egg-info-fq2lk8b5
         cwd: /tmp/pip-install-c84xx8ku/pony_19e84ef4c3814a94bac462a6b845406f/
    Complete output (1 lines):
    Sorry, but pony 0.7.14 requires Python of one of the following versions: 2.7, 3.3-3.9. You have version 3.10.1
    ----------------------------------------
WARNING: Discarding https://files.pythonhosted.org/packages/51/e3/6186f12eb13c3ccac25a744296865e55b2bdb4d3bebc4bffedecf5fe1586/pony-0.7.14.tar.gz#sha256=2f01e84e79ea7a14040225cb6c079bb266e7ba147346356c266490b18c77ce82 (from https://pypi.org/simple/pony/). Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
ERROR: Could not find a version that satisfies the requirement pony==0.7.14
ERROR: No matching distribution found for pony==0.7.14

[2ico]

I had the same issue. I think it has nothing to do with Arch Linux, but with Python 3.10 being too recent.
Python 3.9 will work.

[drew2a]

@DaveJarvis thank you for reporting. Unfortunately, we don't support Arch Linux.

Regarding the python version. We support versions 3.8 and 3.9. Supporting 3.10 require some work on picking up the correct version in pip dependencies (we postpone this support for now).