[MacPorts] #62220: KeePassXC @2.6.4: no member named 'MacOSBigSur' in 'QOperatingSystemVersion'

[MacPorts]

#62220: KeePassXC @2.6.4: no member named 'MacOSBigSur' in
'QOperatingSystemVersion'
------------------------+-----------------------
  Reporter:  thetrial   |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.6.4
Resolution:             |   Keywords:  elcapitan
      Port:  KeePassXC  |
------------------------+-----------------------

Comment (by thetrial):

 The update of openssl to openssl3 seems to break KeePassXC, too. Is there
 no solution to that? Does anybody know how to fix version 2.6.3 to El
 Capitan … and to ensure, that later updates of other ports don’t break
 that? I guess, every change in libs makes that problematic. Am I the only
 one who uses this under El Capitan?!

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Ticket URL: <https://trac.macports.org/ticket/62220#comment:18>
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