FreeBSD web build failed on build-web.ysv.freebsd.org

[User Www-data]

install -C  -o www-data -g www-data -m 444 imagelib/callouts/14.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/15.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/16.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/17.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/18.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/19.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/20.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/21.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
env XML_CATALOG_FILES="file:///usr/local/www/build/head/en_US.ISO8859-1/books/porters-handbook/catalog-cwd.xml  file:///usr/local/www/build/head/en_US.ISO8859-1/share/xml/catalog.xml  file:///usr/local/www/build/head/share/xml/catalog.xml  file:///usr/local/share/xml/catalog" /usr/local/bin/xsltproc  --xinclude --nonet --maxvars 20000 --stringparam latestrevision.timestamp "2017-09-29 10:54:21" --stringparam latestrevision.committer "wosch"		--stringparam latestrevision.number "50969" --param docformatnav "'1'" http://www.FreeBSD.org/XML/share/xml/freebsd-xhtml.xsl book.parsed.xml > book.html
install -C  -o www-data -g www-data -m 444 book.html /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook
install -C  -o www-data -g www-data -m 444 docbook.css /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook
install -C  -o www-data -g www-data -m 444 imagelib/callouts/1.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/2.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/3.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/4.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/5.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/6.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/7.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/8.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/9.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/10.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/11.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/12.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/13.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/14.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/15.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/16.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/17.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/18.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/19.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/20.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
install -C  -o www-data -g www-data -m 444 imagelib/callouts/21.png  /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/imagelib/callouts
/usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/handbook.html -> /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/porters-handbook/index.html
/usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/faq doesn't exist, not linking
/usr/local/www/www.freebsd.org-clean/data/doc/handbook -> /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1/books/handbook
/usr/local/www/www.freebsd.org-clean/data/doc/en -> /usr/local/www/www.freebsd.org-clean/data/doc/en_US.ISO8859-1
===> ports
cd /usr/local/www/build/head/en_US.ISO8859-1/htdocs/ports;  make  .MAKE.LEVEL.ENV=MAKELEVEL DIRPRFX=ports/ -f /usr/local/www/build/head/en_US.ISO8859-1/htdocs/ports/Makefile.inc0 install
make[2]: don't know how to make INDEX. Stop

make[2]: stopped in /usr/local/www/build/head/en_US.ISO8859-1/htdocs/ports
*** Error code 2

Stop.
make[1]: stopped in /usr/local/www/build/head/en_US.ISO8859-1/htdocs/ports
*** Error code 1

Stop.
make: stopped in /usr/local/www/build/head/en_US.ISO8859-1/htdocs
      149.55 real       126.69 user        23.05 sys