tox tests fail without internet connection

[RogerHaase]

Not sure if this is a windows only issue.

GLOB sdist-make: C:\git\moin\setup.py
py35 create: C:\GIT\moin\.tox\py35
ERROR: InterpreterNotFound: python3.5
py36 create: C:\GIT\moin\.tox\py36
ERROR: InterpreterNotFound: python3.6
py37 create: C:\GIT\moin\.tox\py37
ERROR: InterpreterNotFound: python3.7
py38 create: C:\GIT\moin\.tox\py38
ERROR: InterpreterNotFound: python3.8
py39 inst-nodeps: C:\GIT\moin\.tox\.tmp\package\25\moin-2.0.0a9.dev1+g6d950b4e.d20210524.zip
ERROR: invocation failed (exit code 1), logfile: C:\GIT\moin\.tox\py39\log\py39-4.log
================================== log start ==================================
Processing c:\git\moin\.tox\.tmp\package\25\moin-2.0.0a9.dev1+g6d950b4e.d20210524.zip
    ERROR: Command errored out with exit status 1:
     command: 'C:\GIT\moin\.tox\py39\Scripts\python.EXE' -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\haase\\AppData\\Local\\Temp\\pip-req-build-47ye3a_a\\setup.py'"'"'; __file__='"'"'C:\\Users\\haase\\AppData\\Local\\Temp\\pip-req-build-47ye3a_a\\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 'C:\Users\haase\AppData\Local\Temp\pip-pip-egg-info-vlayujb6'
         cwd: C:\Users\haase\AppData\Local\Temp\pip-req-build-47ye3a_a\
    Complete output (37 lines):
    WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x000002110770DEE0>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /simple/setuptools-scm/
    WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x0000021107732130>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /simple/setuptools-scm/
    WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x00000211077322E0>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /simple/setuptools-scm/
    WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x0000021107732490>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /simple/setuptools-scm/
    WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x0000021107732640>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /simple/setuptools-scm/
    ERROR: Could not find a version that satisfies the requirement setuptools_scm
    ERROR: No matching distribution found for setuptools_scm
    Traceback (most recent call last):
      File "C:\GIT\moin\.tox\py39\lib\site-packages\setuptools\installer.py", line 75, in fetch_build_egg
        subprocess.check_call(cmd)
      File "C:\Users\haase\AppData\Local\Programs\Python\Python39\lib\subprocess.py", line 373, in check_call
        raise CalledProcessError(retcode, cmd)
    subprocess.CalledProcessError: Command '['C:\\GIT\\moin\\.tox\\py39\\Scripts\\python.EXE', '-m', 'pip', '--disable-pip-version-check', 'wheel', '--no-deps', '-w', 'C:\\Users\\haase\\AppData\\Local\\Temp\\tmpe28tm_t0', '--quiet', 'setuptools_scm']' returned non-zero exit status 1.
    
    The above exception was the direct cause of the following exception:
    
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "C:\Users\haase\AppData\Local\Temp\pip-req-build-47ye3a_a\setup.py", line 142, in <module>
        setup(**setup_args)
      File "C:\GIT\moin\.tox\py39\lib\site-packages\setuptools\__init__.py", line 152, in setup
        _install_setup_requires(attrs)
      File "C:\GIT\moin\.tox\py39\lib\site-packages\setuptools\__init__.py", line 147, in _install_setup_requires
        dist.fetch_build_eggs(dist.setup_requires)
      File "C:\GIT\moin\.tox\py39\lib\site-packages\setuptools\dist.py", line 721, in fetch_build_eggs
        resolved_dists = pkg_resources.working_set.resolve(
      File "C:\GIT\moin\.tox\py39\lib\site-packages\pkg_resources\__init__.py", line 766, in resolve
        dist = best[req.key] = env.best_match(
      File "C:\GIT\moin\.tox\py39\lib\site-packages\pkg_resources\__init__.py", line 1051, in best_match
        return self.obtain(req, installer)
      File "C:\GIT\moin\.tox\py39\lib\site-packages\pkg_resources\__init__.py", line 1063, in obtain
        return installer(requirement)
      File "C:\GIT\moin\.tox\py39\lib\site-packages\setuptools\dist.py", line 780, in fetch_build_egg
        return fetch_build_egg(self, req)
      File "C:\GIT\moin\.tox\py39\lib\site-packages\setuptools\installer.py", line 77, in fetch_build_egg
        raise DistutilsError(str(e)) from e
    distutils.errors.DistutilsError: Command '['C:\\GIT\\moin\\.tox\\py39\\Scripts\\python.EXE', '-m', 'pip', '--disable-pip-version-check', 'wheel', '--no-deps', '-w', 'C:\\Users\\haase\\AppData\\Local\\Temp\\tmpe28tm_t0', '--quiet', 'setuptools_scm']' returned non-zero exit status 1.
    ----------------------------------------
WARNING: Discarding file:///C:/git/moin/.tox/.tmp/package/25/moin-2.0.0a9.dev1%2Bg6d950b4e.d20210524.zip. Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
WARNING: You are using pip version 21.0.1; however, version 21.1.1 is available.
You should consider upgrading via the 'C:\GIT\moin\.tox\py39\Scripts\python.EXE -m pip install --upgrade pip' command.

=================================== log end ===================================
pypy3 create: C:\GIT\moin\.tox\pypy3
ERROR: InterpreterNotFound: pypy3
flake8 inst-nodeps: C:\GIT\moin\.tox\.tmp\package\25\moin-2.0.0a9.dev1+g6d950b4e.d20210524.zip
ERROR: invocation failed (exit code 1), logfile: C:\GIT\moin\.tox\flake8\log\flake8-6.log
================================== log start ==================================
Processing c:\git\moin\.tox\.tmp\package\25\moin-2.0.0a9.dev1+g6d950b4e.d20210524.zip
    ERROR: Command errored out with exit status 1:
     command: 'C:\GIT\moin\.tox\flake8\Scripts\python.EXE' -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\haase\\AppData\\Local\\Temp\\pip-req-build-ojcu4yvq\\setup.py'"'"'; __file__='"'"'C:\\Users\\haase\\AppData\\Local\\Temp\\pip-req-build-ojcu4yvq\\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 'C:\Users\haase\AppData\Local\Temp\pip-pip-egg-info-ls9qshss'
         cwd: C:\Users\haase\AppData\Local\Temp\pip-req-build-ojcu4yvq\
    Complete output (37 lines):
    WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x00000216BD0E88B0>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /simple/setuptools-scm/
    WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x00000216BD0E8AC0>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /simple/setuptools-scm/
    WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x00000216BD0E8C70>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /simple/setuptools-scm/
    WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x00000216BD0E8E20>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /simple/setuptools-scm/
    WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x00000216BD0E8FD0>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /simple/setuptools-scm/
    ERROR: Could not find a version that satisfies the requirement setuptools_scm
    ERROR: No matching distribution found for setuptools_scm
    Traceback (most recent call last):
      File "C:\GIT\moin\.tox\flake8\lib\site-packages\setuptools\installer.py", line 75, in fetch_build_egg
        subprocess.check_call(cmd)
      File "C:\Users\haase\AppData\Local\Programs\Python\Python39\lib\subprocess.py", line 373, in check_call
        raise CalledProcessError(retcode, cmd)
    subprocess.CalledProcessError: Command '['C:\\GIT\\moin\\.tox\\flake8\\Scripts\\python.EXE', '-m', 'pip', '--disable-pip-version-check', 'wheel', '--no-deps', '-w', 'C:\\Users\\haase\\AppData\\Local\\Temp\\tmpkebd9t6d', '--quiet', 'setuptools_scm']' returned non-zero exit status 1.
    
    The above exception was the direct cause of the following exception:
    
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "C:\Users\haase\AppData\Local\Temp\pip-req-build-ojcu4yvq\setup.py", line 142, in <module>
        setup(**setup_args)
      File "C:\GIT\moin\.tox\flake8\lib\site-packages\setuptools\__init__.py", line 152, in setup
        _install_setup_requires(attrs)
      File "C:\GIT\moin\.tox\flake8\lib\site-packages\setuptools\__init__.py", line 147, in _install_setup_requires
        dist.fetch_build_eggs(dist.setup_requires)
      File "C:\GIT\moin\.tox\flake8\lib\site-packages\setuptools\dist.py", line 721, in fetch_build_eggs
        resolved_dists = pkg_resources.working_set.resolve(
      File "C:\GIT\moin\.tox\flake8\lib\site-packages\pkg_resources\__init__.py", line 766, in resolve
        dist = best[req.key] = env.best_match(
      File "C:\GIT\moin\.tox\flake8\lib\site-packages\pkg_resources\__init__.py", line 1051, in best_match
        return self.obtain(req, installer)
      File "C:\GIT\moin\.tox\flake8\lib\site-packages\pkg_resources\__init__.py", line 1063, in obtain
        return installer(requirement)
      File "C:\GIT\moin\.tox\flake8\lib\site-packages\setuptools\dist.py", line 780, in fetch_build_egg
        return fetch_build_egg(self, req)
      File "C:\GIT\moin\.tox\flake8\lib\site-packages\setuptools\installer.py", line 77, in fetch_build_egg
        raise DistutilsError(str(e)) from e
    distutils.errors.DistutilsError: Command '['C:\\GIT\\moin\\.tox\\flake8\\Scripts\\python.EXE', '-m', 'pip', '--disable-pip-version-check', 'wheel', '--no-deps', '-w', 'C:\\Users\\haase\\AppData\\Local\\Temp\\tmpkebd9t6d', '--quiet', 'setuptools_scm']' returned non-zero exit status 1.
    ----------------------------------------
WARNING: Discarding file:///C:/git/moin/.tox/.tmp/package/25/moin-2.0.0a9.dev1%2Bg6d950b4e.d20210524.zip. Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
WARNING: You are using pip version 21.0.1; however, version 21.1.1 is available.
You should consider upgrading via the 'C:\GIT\moin\.tox\flake8\Scripts\python.EXE -m pip install --upgrade pip' command.

=================================== log end ===================================
___________________________________ summary ___________________________________
ERROR:  py35: InterpreterNotFound: python3.5
ERROR:  py36: InterpreterNotFound: python3.6
ERROR:  py37: InterpreterNotFound: python3.7
ERROR:  py38: InterpreterNotFound: python3.8
ERROR:   py39: InvocationError for command 'C:\GIT\moin\.tox\py39\Scripts\python.EXE' -m pip install --no-deps -U '.tox\.tmp\package\25\moin-2.0.0a9.dev1+g6d950b4e.d20210524.zip' (exited with code 1)
ERROR:  pypy3: InterpreterNotFound: pypy3
ERROR:   flake8: InvocationError for command 'C:\GIT\moin\.tox\flake8\Scripts\python.EXE' -m pip install --no-deps -U '.tox\.tmp\package\25\moin-2.0.0a9.dev1+g6d950b4e.d20210524.zip' (exited with code 1)