Python-3.8.10 update fails during Compile/Install step?

[ermo]

I saw the same thing happening with Python-3.8.6 when I tried to update to that version:

Compiling '/usr/lib/python3.8/turtle.py'...
Listing '/usr/lib/python3.8/site-packages'...
PYTHONPATH=/usr/lib/python3.8 LD_LIBRARY_PATH=/Data/Compile/Sources/Python-3.8.10:/System/Index/lib64:/System/Index/lib \
	./python -E -Wi /usr/lib/python3.8/compileall.py \
	-j0 -d /usr/lib/python3.8/site-packages -f \
	-x badsyntax /usr/lib/python3.8/site-packages
Listing '/usr/lib/python3.8/site-packages'...
Compiling '/usr/lib/python3.8/site-packages/Corrections.py'...
*** FileExistsError: /usr/lib/python3.8/site-packages/__pycache__/Corrections.cpython-38.pyc is a symlink and will be changed into a regular file if import writes a byte-compiled file to it
Compiling '/usr/lib/python3.8/site-packages/UseFlags.py'...
*** FileExistsError: /usr/lib/python3.8/site-packages/__pycache__/UseFlags.cpython-38.pyc is a symlink and will be changed into a regular file if import writes a byte-compiled file to it
Compiling '/usr/lib/python3.8/site-packages/DescribeProgram.py'...
*** FileExistsError: /usr/lib/python3.8/site-packages/__pycache__/DescribeProgram.cpython-38.pyc is a symlink and will be changed into a regular file if import writes a byte-compiled file to it
Compiling '/usr/lib/python3.8/site-packages/GuessLatest.py'...
*** FileExistsError: /usr/lib/python3.8/site-packages/__pycache__/GuessLatest.cpython-38.pyc is a symlink and will be changed into a regular file if import writes a byte-compiled file to it
Compiling '/usr/lib/python3.8/site-packages/easy_install.py'...
*** FileExistsError: /usr/lib/python3.8/site-packages/__pycache__/easy_install.cpython-38.pyc is a symlink and will be changed into a regular file if import writes a byte-compiled file to it
Compiling '/usr/lib/python3.8/site-packages/CheckDependencies.py'...
*** FileExistsError: /usr/lib/python3.8/site-packages/__pycache__/CheckDependencies.cpython-38.pyc is a symlink and will be changed into a regular file if import writes a byte-compiled file to it
Compiling '/usr/lib/python3.8/site-packages/GuessProgramCase.py'...
*** FileExistsError: /usr/lib/python3.8/site-packages/__pycache__/GuessProgramCase.cpython-38.pyc is a symlink and will be changed into a regular file if import writes a byte-compiled file to it
Compiling '/usr/lib/python3.8/site-packages/Alien.py'...
*** FileExistsError: /usr/lib/python3.8/site-packages/__pycache__/Alien.cpython-38.pyc is a symlink and will be changed into a regular file if import writes a byte-compiled file to it
Compiling '/usr/lib/python3.8/site-packages/PythonUtils.py'...
*** FileExistsError: /usr/lib/python3.8/site-packages/__pycache__/PythonUtils.cpython-38.pyc is a symlink and will be changed into a regular file if import writes a byte-compiled file to it
Compiling '/usr/lib/python3.8/site-packages/FindPackage.py'...
*** FileExistsError: /usr/lib/python3.8/site-packages/__pycache__/FindPackage.cpython-38.pyc is a symlink and will be changed into a regular file if import writes a byte-compiled file to it
Compiling '/usr/lib/python3.8/site-packages/GetAvailable.py'...
*** FileExistsError: /usr/lib/python3.8/site-packages/__pycache__/GetAvailable.cpython-38.pyc is a symlink and will be changed into a regular file if import writes a byte-compiled file to it
make: [Makefile:1440: libinstall] Error 1 (ignored)
PYTHONPATH=/usr/lib/python3.8 LD_LIBRARY_PATH=/Data/Compile/Sources/Python-3.8.10:/System/Index/lib64:/System/Index/lib \
	./python -E -Wi -O /usr/lib/python3.8/compileall.py \
	-j0 -d /usr/lib/python3.8/site-packages -f \
	-x badsyntax /usr/lib/python3.8/site-packages
Listing '/usr/lib/python3.8/site-packages'...
Compiling '/usr/lib/python3.8/site-packages/FindPackage.py'...
Compiling '/usr/lib/python3.8/site-packages/easy_install.py'...
Compiling '/usr/lib/python3.8/site-packages/Alien.py'...
Compiling '/usr/lib/python3.8/site-packages/PythonUtils.py'...
Compiling '/usr/lib/python3.8/site-packages/CheckDependencies.py'...
Compiling '/usr/lib/python3.8/site-packages/DescribeProgram.py'...
Compiling '/usr/lib/python3.8/site-packages/UseFlags.py'...
Compiling '/usr/lib/python3.8/site-packages/GuessProgramCase.py'...
Compiling '/usr/lib/python3.8/site-packages/Corrections.py'...
Compiling '/usr/lib/python3.8/site-packages/GuessLatest.py'...
Compiling '/usr/lib/python3.8/site-packages/GetAvailable.py'...
PYTHONPATH=/usr/lib/python3.8 LD_LIBRARY_PATH=/Data/Compile/Sources/Python-3.8.10:/System/Index/lib64:/System/Index/lib \
	./python -E -Wi -OO /usr/lib/python3.8/compileall.py \
	-j0 -d /usr/lib/python3.8/site-packages -f \
	-x badsyntax /usr/lib/python3.8/site-packages
Listing '/usr/lib/python3.8/site-packages'...
Compiling '/usr/lib/python3.8/site-packages/DescribeProgram.py'...
Compiling '/usr/lib/python3.8/site-packages/GetAvailable.py'...
Compiling '/usr/lib/python3.8/site-packages/easy_install.py'...
Compiling '/usr/lib/python3.8/site-packages/GuessLatest.py'...
Compiling '/usr/lib/python3.8/site-packages/GuessProgramCase.py'...
Compiling '/usr/lib/python3.8/site-packages/CheckDependencies.py'...
Compiling '/usr/lib/python3.8/site-packages/Alien.py'...
Compiling '/usr/lib/python3.8/site-packages/PythonUtils.py'...
Compiling '/usr/lib/python3.8/site-packages/FindPackage.py'...
Compiling '/usr/lib/python3.8/site-packages/Corrections.py'...
Compiling '/usr/lib/python3.8/site-packages/UseFlags.py'...
PYTHONPATH=/usr/lib/python3.8 LD_LIBRARY_PATH=/Data/Compile/Sources/Python-3.8.10:/System/Index/lib64:/System/Index/lib \
	./python -E -m lib2to3.pgen2.driver /usr/lib/python3.8/lib2to3/Grammar.txt
Generating grammar tables from /usr/lib/python3.8/lib2to3/Grammar.txt
Writing grammar tables to /usr/lib/python3.8/lib2to3/Grammar3.8.10.final.0.pickle
PYTHONPATH=/usr/lib/python3.8 LD_LIBRARY_PATH=/Data/Compile/Sources/Python-3.8.10:/System/Index/lib64:/System/Index/lib \
	./python -E -m lib2to3.pgen2.driver /usr/lib/python3.8/lib2to3/PatternGrammar.txt
Generating grammar tables from /usr/lib/python3.8/lib2to3/PatternGrammar.txt
Writing grammar tables to /usr/lib/python3.8/lib2to3/PatternGrammar3.8.10.final.0.pickle
if test "xupgrade" != "xno"  ; then \
	case upgrade in \
		upgrade) ensurepip="--upgrade" ;; \
		install|*) ensurepip="" ;; \
	esac; \
	LD_LIBRARY_PATH=/Data/Compile/Sources/Python-3.8.10:/System/Index/lib64:/System/Index/lib ./python -E -m ensurepip \
		$ensurepip --root=/ ; \
fi
Looking in links: /tmp/tmp94exrsyf
Requirement already satisfied: setuptools in /System/Index/lib/python3.8/site-packages (49.2.1)
Processing /Data/Variable/tmp/tmp94exrsyf/setuptools-56.0.0-py3-none-any.whl
Requirement already satisfied: pip in /System/Index/lib/python3.8/site-packages (20.2.1)
Processing /Data/Variable/tmp/tmp94exrsyf/pip-21.1.1-py3-none-any.whl
Installing collected packages: setuptools, pip
  Attempting uninstall: setuptools
    Found existing installation: setuptools 49.2.1
    Uninstalling setuptools-49.2.1:
      Successfully uninstalled setuptools-49.2.1
  Rolling back uninstall of setuptools
  Moving to /Programs/Python/3.8.6/lib/python3.8/site-packages/pkg_resources/
   from /Programs/Python/3.8.6/lib/python3.8/site-packages/~kg_resources
  Moving to /Programs/Python/3.8.6/lib/python3.8/site-packages/setuptools-49.2.1.dist-info/
   from /Programs/Python/3.8.6/lib/python3.8/site-packages/~etuptools-49.2.1.dist-info
  Moving to /Programs/Python/3.8.6/lib/python3.8/site-packages/setuptools/
   from /Programs/Python/3.8.6/lib/python3.8/site-packages/~etuptools
  Moving to /System/Index/bin/easy_install-3.8
   from /Data/Variable/tmp/pip-uninstall-5oz5ivw9/easy_install-3.8
  Moving to /System/Index/lib/python3.8/site-packages/__pycache__/easy_install.cpython-38.pyc
   from /Data/Variable/tmp/pip-uninstall-riu53daq/easy_install.cpython-38.pyc
  Moving to /System/Index/lib/python3.8/site-packages/easy_install.py
   from /Data/Variable/tmp/pip-uninstall-nv1013dx/easy_install.py
ERROR: Could not install packages due to an OSError: [Errno 2] No such file or directory: '/usr/lib/python3.8/site-packages/pkg_resources/__init__.py'

Traceback (most recent call last):
  File "/Data/Compile/Sources/Python-3.8.10/Lib/runpy.py", line 194, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/Data/Compile/Sources/Python-3.8.10/Lib/runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "/Data/Compile/Sources/Python-3.8.10/Lib/ensurepip/__main__.py", line 5, in <module>
    sys.exit(ensurepip._main())
  File "/Data/Compile/Sources/Python-3.8.10/Lib/ensurepip/__init__.py", line 206, in _main
    return _bootstrap(
  File "/Data/Compile/Sources/Python-3.8.10/Lib/ensurepip/__init__.py", line 125, in _bootstrap
    return _run_pip(args + [p[0] for p in _PROJECTS], additional_paths)
  File "/Data/Compile/Sources/Python-3.8.10/Lib/ensurepip/__init__.py", line 34, in _run_pip
    return subprocess.run([sys.executable, "-c", code], check=True).returncode
  File "/Data/Compile/Sources/Python-3.8.10/Lib/subprocess.py", line 516, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['/Data/Compile/Sources/Python-3.8.10/python', '-c', '\nimport runpy\nimport sys\nsys.path = [\'/tmp/tmp94exrsyf/setuptools-56.0.0-py3-none-any.whl\', \'/tmp/tmp94exrsyf/pip-21.1.1-py3-none-any.whl\'] + sys.path\nsys.argv[1:] = [\'install\', \'--no-cache-dir\', \'--no-index\', \'--find-links\', \'/tmp/tmp94exrsyf\', \'--root\', \'/\', \'--upgrade\', \'setuptools\', \'pip\']\nrunpy.run_module("pip", run_name="__main__", alter_sys=True)\n']' returned non-zero exit status 1.
make: *** [Makefile:1198: install] Error 1
UnionSandbox: Cleaning up.
UnionSandbox: Moving entries to: /Programs/Python/3.8.10/.SandboxInstall_Root
Compile: Installation was moved to /Programs/Python/3.8.10-failed
Compile: Python 3.8.10 - Installation step failed.
ermo@mrwing master /Data/Compile/Recipes]