[MacPorts] #52534: Error: org.macports.build for port py35-graph-tool returned: command execution failed

[MacPorts]

#52534: Error: org.macports.build for port py35-graph-tool returned: command
execution failed
-----------------------------+----------------------------
  Reporter:  garethsimons@…  |      Owner:  jyrkiwahlstedt
      Type:  defect          |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:  2.3.4
Resolution:                  |   Keywords:
      Port:  py-graph-tool   |
-----------------------------+----------------------------

Comment (by mamoll):

 @wladston there's no mechanism in MacPorts to depend on a specific variant
 of a port. The py-graph-tool port will give an error message when you have
 boost installed with the wrong python variant.

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Ticket URL: <https://trac.macports.org/ticket/52534#comment:10>
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