[MacPorts] #42744: gtkspell2 fails to build "failed to load network entity"

[MacPorts]

#42744: gtkspell2 fails to build "failed to load network entity"
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  Reporter:  jfcaron@…  |      Owner:  macports-tickets@…
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.2.1
Resolution:             |   Keywords:
      Port:  gtkspell2  |
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Comment (by jfcaron@…):

 Replying to [comment:3 ryandesign@…]:
 > The log says "`I/O error : Attempt to load network entity
 http://docbook.sourceforge.net/release/xsl/current/html/chunk.xsl`". Maybe
 there is or was a network problem. Are you able to access that URL now,
 e.g. in a web browser? If so, try installing the port again.

 Yes, I can access that file in a browser (it's a pretty short xml-looking
 file if you ignore the comments), but the build still fails with that
 error message.  The other very-similar bug report claims that build phases
 should never try to access the network, so it's weird that it's even
 trying to look for files on the internet after the archives/distfiles
 phases.

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Ticket URL: <https://trac.macports.org/ticket/42744#comment:4>
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