[MacPorts] #64660: inkscape: build failure due to "no template named 'optional' in namespace 'std'"

[MacPorts]

#64660: inkscape: build failure due to "no template named 'optional' in namespace
'std'"
-------------------------+----------------------
  Reporter:  dyne2meter  |      Owner:  mascguy
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.7.1
Resolution:              |   Keywords:
      Port:  inkscape    |
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Comment (by mf2k):

 I'm seeing this on Monterey.

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Ticket URL: <https://trac.macports.org/ticket/64660#comment:3>
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