[MacPorts] #45310: py27-pyobjc build fails with setuptools 6

[MacPorts]

#45310: py27-pyobjc build fails with setuptools 6
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  Reporter:  paulvanlorenzo@…  |      Owner:  macports-tickets@…
      Type:  defect            |     Status:  new
  Priority:  Normal            |  Milestone:
 Component:  ports             |    Version:  2.3.1
Resolution:                    |   Keywords:
      Port:  py27-pyobjc       |
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Comment (by wichert@…):

 There is a relevant upstream ticket for this issue as well:
 https://bitbucket.org/ronaldoussoren/pyobjc/issue/99/install-broken-under-
 newest-version-of

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Ticket URL: <https://trac.macports.org/ticket/45310#comment:11>
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