[MacPorts] #53519: py34-altgraph: No such file or directory: 'doc/_static'

[MacPorts]

#53519: py34-altgraph: No such file or directory: 'doc/_static'
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 Reporter:  skymoo  |      Owner:  jmroot
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:  py-altgraph
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 Looks like `py34-altgraph` has the same issue as `py34-py2app` #53429,
 build log is attached.

 The same workaround used for `py34-py2app` also works in this case.

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Ticket URL: <https://trac.macports.org/ticket/53519>
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