[MacPorts] #68293: R-R6 @2.5.1.9000 source package cannot be retrieved

[MacPorts]

#68293: R-R6 @2.5.1.9000 source package cannot be retrieved
--------------------------+--------------------
  Reporter:  quintusdias  |      Owner:  (none)
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.8.1
Resolution:               |   Keywords:
      Port:  R-R6         |
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Comment (by barracuda156):

 Looks like for some reason all ports which had `macports_distfiles` set
 got broken :(

 Anyway, I will fix everything now.

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Ticket URL: <https://trac.macports.org/ticket/68293#comment:2>
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