Trying to install pip-accel, it insists on downgrading pip to 2.7. How can I get it to respect the current version, 21.1.2

[aarek-eng]

Here's how it looks:

PS C:\Windows\system32> py -m pip install pip-accel --user
Collecting pip-accel
  Using cached pip_accel-0.43-py3-none-any.whl
Requirement already satisfied: cached-property>=0.1.5 in c:\users\erika\appdata\roaming\python\python39\site-packages (from pip-accel) (1.5.2)
Collecting pip<7.2,>=7.0
  Using cached pip-7.1.2-py2.py3-none-any.whl (1.1 MB)
Collecting humanfriendly>=1.42
  Using cached humanfriendly-9.1-py2.py3-none-any.whl (86 kB)
Requirement already satisfied: setuptools>=7.0 in c:\users\erika\appdata\local\programs\python\python39\lib\site-packages (from pip-accel) (57.0.0)
Requirement already satisfied: coloredlogs>=3.0 in c:\users\erika\appdata\roaming\python\python39\site-packages (from pip-accel) (15.0)
Collecting pyreadline
  Using cached pyreadline-2.1-py3-none-any.whl
Installing collected packages: pyreadline, humanfriendly, pip, pip-accel
  WARNING: The script humanfriendly.exe is installed in 'C:\Users\ERIKA\AppData\Roaming\Python\Python39\Scripts' which is not on PATH.
  Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
  WARNING: The scripts pip.exe, pip3.9.exe and pip3.exe are installed in 'C:\Users\ERIKA\AppData\Roaming\Python\Python39\Scripts' which is not on PATH.
  Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
  WARNING: The script pip-accel.exe is installed in 'C:\Users\ERIKA\AppData\Roaming\Python\Python39\Scripts' which is not on PATH.
  Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
Successfully installed humanfriendly-9.1 pip-7.1.2 pip-accel-0.43 pyreadline-2.1

PS C:\Windows\system32> py get-pip.py
Collecting pip
  Using cached pip-21.1.2-py3-none-any.whl (1.5 MB)
Installing collected packages: pip
  Attempting uninstall: pip
    Found existing installation: pip 7.1.2
    Uninstalling pip-7.1.2:
      Successfully uninstalled pip-7.1.2
  WARNING: The scripts pip.exe, pip3.9.exe and pip3.exe are installed in 'C:\Users\ERIKA\AppData\Local\Programs\Python\Python39\Scripts' which is not on PATH.
  Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
pip-accel 0.43 requires pip<7.2,>=7.0, but you have pip 21.1.2 which is incompatible.
Successfully installed pip-21.1.2