[MacPorts] #66462: port cannot install again graphviz on PPC Leopard, Mac OS X 10.5.6

[MacPorts]

#66462: port cannot install again graphviz on PPC Leopard, Mac OS X 10.5.6
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  Reporter:  ballapete  |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  base       |    Version:  2.8.0
Resolution:             |   Keywords:  leopard ppc
      Port:  graphviz   |
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Comment (by rmottola):

 I think you need to clean the build first?
 Upgrading tries to preserve the existing variants, if you build/install
 then you need to specify them.

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Ticket URL: <https://trac.macports.org/ticket/66462#comment:2>
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