python3 -m pip install flask==1.1.1 diamond-dependency==1.0.0 --upgrade --upgrade-strategy only-if-needed --no-warn-script-location --no-warn-conflicts --force-reinstall --no-compile --user

$ python3 -m pip install flask==1.1.1 diamond-dependency==1.0.0 --upgrade --upgrade-strategy only-if-needed --no-warn-script-location --no-warn-conflicts --force-reinstall --no-compile --user
Collecting diamond-dependency==1.0.0
  Downloading diamond_dependency-1.0.0-py3-none-any.whl (1.1 kB)
Collecting flask==1.1.1
  Downloading Flask-1.1.1-py2.py3-none-any.whl (94 kB)
     |████████████████████████████████| 94 kB 1.7 MB/s
Collecting click>=5.1
  Downloading click-7.1.2-py2.py3-none-any.whl (82 kB)
     |████████████████████████████████| 82 kB 849 kB/s
Collecting itsdangerous>=0.24
  Downloading itsdangerous-1.1.0-py2.py3-none-any.whl (16 kB)
Collecting Jinja2>=2.10.1
  Downloading Jinja2-2.11.2-py2.py3-none-any.whl (125 kB)
     |████████████████████████████████| 125 kB 8.8 MB/s
Collecting MarkupSafe>=0.23
  Downloading MarkupSafe-1.1.1.tar.gz (19 kB)
Collecting sub-dependency-a
  Downloading sub_dependency_a-1.0.0-py3-none-any.whl (1.1 kB)
Collecting sub-dependency-b
  Downloading sub_dependency_b-1.0.0-py3-none-any.whl (1.1 kB)
INFO: pip is looking at multiple versions of sub-dependency-a to determine which version is compatible with other requirements. This could take a while.
INFO: pip is looking at multiple versions of markupsafe to determine which version is compatible with other requirements. This could take a while.
Collecting MarkupSafe>=0.23
  Downloading MarkupSafe-1.1.0.tar.gz (18 kB)
  Downloading MarkupSafe-1.0.tar.gz (14 kB)
    ERROR: Command errored out with exit status 1:
     command: /usr/local/bin/python3 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-1qalpscj/markupsafe_4ed9795d2ce54eb69fc8b87f9e9e4c69/setup.py'"'"'; __file__='"'"'/tmp/pip-install-1qalpscj/markupsafe_4ed9795d2ce54eb69fc8b87f9e9e4c69/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-pip-egg-info-l25ks531
         cwd: /tmp/pip-install-1qalpscj/markupsafe_4ed9795d2ce54eb69fc8b87f9e9e4c69/
    Complete output (5 lines):
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-install-1qalpscj/markupsafe_4ed9795d2ce54eb69fc8b87f9e9e4c69/setup.py", line 6, in <module>
        from setuptools import setup, Extension, Feature
    ImportError: cannot import name 'Feature' from 'setuptools' (/usr/local/lib/python3.9/site-packages/setuptools/__init__.py)
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.