[MacPorts] #60000: git @2.25.0: version conflict for package "Tcl": have 8.5.9, need 8.6

[MacPorts]

#60000: git @2.25.0: version conflict for package "Tcl": have 8.5.9, need 8.6
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  Reporter:  akimd   |      Owner:  ci42
      Type:  defect  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.6.2
Resolution:          |   Keywords:
      Port:  git     |
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Comment (by akimd):

 Hi!  Thanks for your answer.
 The upstream issue is about the fact that Tcl 8.6 is now required.  My
 issue is somewhat different, since I _have_ it, via MacPorts.  So, yup,
 that's definitely a build issue.  And I suspect there must be some way at
 launch-time to specify which Tcl to use, but my Tcl-foo is null :(

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Ticket URL: <https://trac.macports.org/ticket/60000#comment:4>
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