do not access network when make html in mac

[wuzhouhui]

Hi,

I have two hosts to compile svnbook, one is ubuntu 14.04 and another is mac os.
When compile svnbook in ubuntu by

    make html

the compilation completes within 20s. But in mac, the compilation failed
frequently and will cost several minutes before exit:

$ make html
xmllint --noout --valid book/book.xml
if ! test -e "../tools/xsl"; then ../tools/bin/find-xsl.py; fi
xsltproc  --output book/svn-book.html \
	  `[ -d stylesheets ] && echo stylesheets || echo ../tools`/html-stylesheet.xsl book/book.xml
http://www.oasis-open.org/docbook/xml/4.5/dbpoolx.mod:3795: parser error : Comment must not contain '--' (double-hyphen)
<!--end of allow.html.tables-->]]>
    ^
http://www.oasis-open.org/docbook/xml/4.5/dbpoolx.mod:3811: parser warning : PEReference: %tables.role.attrib; not found
	%tables.role.attrib;">
	                     ^
http://www.oasis-open.org/docbook/xml/4.5/dbpoolx.mod:3815: parser warning : PEReference: %bodyatt; not found
	%secur;">
	        ^
http://www.oasis-open.org/docbook/xml/4.5/dbpoolx.mod:3815: parser warning : PEReference: %secur; not found
	%secur;">
	        ^
http://www.oasis-open.org/docbook/xml/4.5/dbpoolx.mod:3868: parser warning : PEReference: %tablemodel; not found
%tablemodel;
            ^
http://www.oasis-open.org/docbook/xml/4.5/dbpoolx.mod:3873: parser warning : PEReference: %informaltable.module; not found
<![%informaltable.module;[
                         ^
http://www.oasis-open.org/docbook/xml/4.5/dbpoolx.mod:3873: parser error : conditional section INCLUDE or IGNORE keyword expected
<![%informaltable.module;[
                         ^
unable to parse book/book.xml
make: *** [book/svn-book.html] Error 6


I found that the compilation in mac will access network but not for ubuntu,
so is there a way to accelerate compilation in mac?


Thanks.