[MacPorts] #60620: grass7: env: python3: No such file or directory

[MacPorts]

#60620: grass7: env: python3: No such file or directory
------------------------+--------------------
 Reporter:  ryandesign  |      Owner:  (none)
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.6.2
 Keywords:              |       Port:  grass7
------------------------+--------------------
 grass7 fails to build:

 {{{
 :info:build env: python3: No such file or directory
 }}}

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Ticket URL: <https://trac.macports.org/ticket/60620>
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