[MacPorts] #65097: py38-jinja2 @3.1.2 does not build macOS High Sierra, Version 10.12.6, because: /opt/local/Library/Frameworks/Python.framework/Versions/3.8/bin/python3.8: No module named install.__main__; 'install' is a package and cannot be directly executed

[MacPorts]

#65097: py38-jinja2 @3.1.2 does not build macOS High Sierra, Version 10.12.6,
because:
/opt/local/Library/Frameworks/Python.framework/Versions/3.8/bin/python3.8:
No module named install.__main__; 'install' is a package and cannot be
directly executed
------------------------+------------------------
  Reporter:  ballapete  |      Owner:  jmroot
      Type:  defect     |     Status:  assigned
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.7.2
Resolution:             |   Keywords:  highsierra
      Port:  py-jinja2  |
------------------------+------------------------

Comment (by ballapete):

 I tried to upgrade `py38-jinja2` via the command `port -vdst upgrade
 py38-jinja2` – is this correct?

 I also counted the Python packages port and pip know as installed
 (probably). Port knows of 82 and pip of 88. So there must be six Python
 packages that were installed with pip.

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Ticket URL: <https://trac.macports.org/ticket/65097#comment:3>
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