[MacPorts] #72010: py38-setuptools fails to install - circular dependency issue with py38-build?

[MacPorts]

#72010: py38-setuptools fails to install - circular dependency issue with
py38-build?
--------------------+-----------------------------
 Reporter:  jgrg    |      Owner:  (none)
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:  2.10.5
 Keywords:          |       Port:  py38-setuptools
--------------------+-----------------------------
 While running a `port restore` to upgrade the MacPorts I have in my home
 directory after an OS upgrade to 15.2, `py38-setuptools` (required by
 `s3cmd`) fails to install. The command that fails includes `python3.8 -m
 build`, which fails because the `build` module is not installed. The
 `build` module would be installed by the `py38-build` port, but that is
 not a build dependency of `py38-setuptools`. I can't install `py38-build`
 because one of its build dependencies is `py38-setuptools`!

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Ticket URL: <https://trac.macports.org/ticket/72010>
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