[MacPorts] #70512: x86_64 base installation on arm64 is still x86_64 after migration

[MacPorts]

#70512: x86_64 base installation on arm64 is still x86_64 after migration
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  Reporter:  dzogrim  |      Owner:  (none)
      Type:  defect   |     Status:  new
  Priority:  High     |  Milestone:
 Component:  base     |    Version:  2.10.0
Resolution:           |   Keywords:
      Port:           |
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Comment (by jmroot):

 If you'd like to help test a potential fix, please try applying the change
 linked in the previous comment to your
 `/opt/local/libexec/macports/lib/macports1.0/selfupdate.tcl`.

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Ticket URL: <https://trac.macports.org/ticket/70512#comment:6>
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