[MacPorts] #67173: ffmpeg-upstream @5.1.2_4+gpl2+gpl3: broken build

[MacPorts]

#67173: ffmpeg-upstream @5.1.2_4+gpl2+gpl3: broken build
------------------------------+----------------------
  Reporter:  townba           |      Owner:  mascguy
      Type:  defect           |     Status:  assigned
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:  2.8.1
Resolution:                   |   Keywords:
      Port:  ffmpeg-upstream  |
------------------------------+----------------------

Comment (by townba):

 I've attached the log for `sudo port -s install ffmpeg-upstream`. Note
 that I have the problem even without specifying variants (that wasn't the
 case before).

 `metal` is still in my list of external libraries.

-- 
Ticket URL: <https://trac.macports.org/ticket/67173#comment:9>
MacPorts <https://www.macports.org/>
Ports system for macOS