Given following log snippets, their explanation, and nothing else, explain what failure, if any, occurred during build of this package.

  Snippets are in a format of [X] : [Y], where [X] is a log snippet, and [Y] is the explanation.

  Snippets are delimited with '================'.

  Drawing on information from all snippets, provide a concise explanation of the issue and recommend a solution.

  Explanation of the issue, and recommended solution, should take a handful of sentences.

  Snippets:

  [I/O error : Attempt to load network entity http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl]: [Error message with build failure cause.]
=============
[xsltproc --nonet -o doc/ambiguous_words.1 http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl -]: [Origin call for internet access.]

Issue: There was intention to download data from the internet during the build. This is not allowed as per https://docs.fedoraproject.org/en-US/packaging-guidelines/#_build_time_network_access
Resolution: Make sure the package doesn't require downloading anything during the build phase.