[MacPorts] #70950: qgis3 on macOS 10.13.6 failed to build

[MacPorts]

#70950: qgis3 on macOS 10.13.6   failed to build
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  Reporter:  Nicob73    |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:  MacPorts 2.10.2
 Component:  ports      |    Version:  2.10.1
Resolution:             |   Keywords:
      Port:  qgis3 qt5  |
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Comment (by ryandesign):

 Replying to [ticket:70950 Nicob73]:
 > I can no longer update qgis due to qt5-qttools 5.15.15_0

 That's #70682.

 > Is it possible to use old package qt5-qttools 5.15.12_0 to build the
 current qgis3 version ?

 wiki:howto/InstallingOlderPort

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Ticket URL: <https://trac.macports.org/ticket/70950#comment:3>
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