[MacPorts] #68586: opam @2.1.5 fails to build on Sonoma: sed: opam.install: No such file or directory

[MacPorts]

#68586: opam @2.1.5 fails to build on Sonoma: sed: opam.install: No such file or
directory
---------------------------+----------------------
  Reporter:  barracuda156  |      Owner:  pmetzger
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.8.1
Resolution:                |   Keywords:  sonoma
      Port:  opam          |
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Comment (by barracuda156):

 Replying to [comment:2 pmetzger]:
 > It works for me on Sonoma. I find this puzzling.

 Same result, still fails. I have nothing custom Ocaml-related on this
 system, and pretty much everything is default (well, I have upgraded MPICH
 to use modern Fortran, but I am sure it is irrelevant for `opam`). So no
 ideas too.

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Ticket URL: <https://trac.macports.org/ticket/68586#comment:5>
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