[MacPorts] #68340: go @1.17.13_0: environment variables for olders macOS versions cause bash to print "wrong substitution" and thus compiles fail.

[MacPorts]

#68340: go @1.17.13_0: environment variables for olders macOS versions cause bash
to print "wrong substitution" and thus compiles fail.
------------------------+--------------------
  Reporter:  garoffoli  |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:
      Port:  go         |
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Comment (by tehcog):

 I haven't been able to get anything that uses 'go' to upgrade for quite
 some time now on Mavericks (exa: [66296
 https://trac.macports.org/ticket/66296], fzf: [66295
 https://trac.macports.org/ticket/66295]).  Looks like the same may be
 becomming true with rust as well ([68719
 https://trac.macports.org/ticket/68719]).  I can understand google
 breaking everything as it is now to be expected, but Et tu, Rust? o_0

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Ticket URL: <https://trac.macports.org/ticket/68340#comment:9>
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