Wireshark-dev: [Wireshark-dev] My Windows build seemed to be going so well until ...

From: Richard Sharpe <realrichardsharpe@xxxxxxxxx>
Date: Sun, 18 Jun 2017 15:18:03 -0700
Hi folks,

I am getting this:
----------------------------

       "C:\Development\wsbuild64\Wireshark.sln" (default target) (1) ->
       "C:\Development\wsbuild64\docbook\release_notes_html.vcxproj.metaproj"
(default target) (46) ->
       "C:\Development\wsbuild64\docbook\release_notes_html.vcxproj"
(default target) (101) ->
       (CustomBuild target) ->
         a2x : error : "xmllint" --nonet --noout --valid
"/cygdrive/c/Development/wsbuild64/docbook/release-notes.xml"
       returned non-zero exit status 4
[C:\Development\wsbuild64\docbook\release_notes_html.vcxproj]


       "C:\Development\wsbuild64\Wireshark.sln" (default target) (1) ->
       "C:\Development\wsbuild64\docbook\user_guide_chm.vcxproj.metaproj"
(default target) (62) ->
       "C:\Development\wsbuild64\docbook\user_guide_chm.vcxproj"
(default target) (116) ->
         CUSTOMBUILD : I/O error : Attempt to load network entity
http://docbook.sourceforge.net/release/xsl/current/ht
       mlhelp/htmlhelp.xsl
[C:\Development\wsbuild64\docbook\user_guide_chm.vcxproj]
         CUSTOMBUILD : compilation error : file
/cygdrive/c/Development/wireshark/docbook/custom_layer_chm.xsl line 8
e
       lement import [C:\Development\wsbuild64\docbook\user_guide_chm.vcxproj]


       "C:\Development\wsbuild64\Wireshark.sln" (default target) (1) ->
       "C:\Development\wsbuild64\docbook\developer_guide_chm.vcxproj.metaproj"
(default target) (14) ->
       "C:\Development\wsbuild64\docbook\developer_guide_chm.vcxproj"
(default target) (119) ->
         CUSTOMBUILD : I/O error : Attempt to load network entity
http://docbook.sourceforge.net/release/xsl/current/ht
       mlhelp/htmlhelp.xsl
[C:\Development\wsbuild64\docbook\developer_guide_chm.vcxproj]
         CUSTOMBUILD : compilation error : file
/cygdrive/c/Development/wireshark/docbook/custom_layer_chm.xsl line 8
e
       lement import
[C:\Development\wsbuild64\docbook\developer_guide_chm.vcxproj]
----------------------------

A quick search suggests that other people are seeing similar errors. I
definitely have access to the internet and am doing this from home.
Also, a wget from a different shell (cygwin) succeeds for that file.

Is there some tool I have failed to install that is needed?

-- 
Regards,
Richard Sharpe
(何以解憂?唯有杜康。--曹操)