[MacPorts] #63993: py39-opencv4 4.5.2_1 port build fails on macOS12 arm64

[MacPorts]

#63993: py39-opencv4 4.5.2_1 port build fails on macOS12 arm64
------------------------+--------------------------
 Reporter:  bal-agates  |      Owner:  (none)
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.7.1
 Keywords:  opencv4     |       Port:  py39-opencv4
------------------------+--------------------------
 The command "sudo port install py39-opencv4" failed on macOS 12 (Monterey)
 for arm64 with

 {{{
 Error: No files have been installed in the destroot directory!
 }}}

 I think the problem is it could not find

 {{{
 https://packages.macports.org/py39-opencv4/py39-opencv4-4.5.2_1.darwin_21.arm64.tbz2
 }}}

 I verified that file does not exist.

 Building from source with the "port -s" option worked.

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Ticket URL: <https://trac.macports.org/ticket/63993>
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