[MacPorts] #54685: Error: Failed to build webkit2-gtk: command execution failed

[MacPorts]

#54685: Error: Failed to build webkit2-gtk: command execution failed
--------------------------+----------------------
  Reporter:  manfredo89   |      Owner:  jeremyhu
      Type:  defect       |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.4.1
Resolution:               |   Keywords:
      Port:  webkit2-gtk  |
--------------------------+----------------------

Comment (by kencu):

 I wonder if you have some cruft in `/opt/local/var/macports/build` that is
 messing you up here. I'd consider `cd /opt/local/var/macports/build` and
 delete everything in that directory (only that exact directory!!) before
 you try again.

 MacPorts is meant to download that package for you automatically, but if
 you already have downloaded it, you can usually skip that step if you put
 the proper (exactly proper) package into
 `/opt/local/var/macports/incoming/verified`. Your variants (+'s and -'s)
 have to exactly match the downloaded package for this to work.

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Ticket URL: <https://trac.macports.org/ticket/54685#comment:9>
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