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

[User Www-data]

===> releases/6.0R
===> releases/6.1R
===> releases/6.2R
===> releases/6.3R
===> releases/6.4R
===> releases/7.0R
===> releases/7.1R
===> releases/7.2R
===> releases/7.3R
===> releases/7.4R
===> releases/8.0R
===> releases/8.1R
===> releases/8.2R
===> releases/8.3R
===> releases/8.4R
===> releases/9.0R
===> releases/9.1R
===> releases/9.2R
===> releases/9.3R
===> releases/10.0R
===> releases/10.1R
===> releases/10.2R
===> releases/10.3R
===> releases/10.4R
===> releases/11.0R
===> releases/11.1R
===> releases/12.0R
make[2]: "/usr/local/www/build/head/en_US.ISO8859-1/htdocs/releases/12.0R/Makefile" line 69: warning: "MAN4DIR not found.  Unable to build hardware.html"
`index.html' is up to date.
`schedule.html' is up to date.
`docbook.css' is up to date.
`/usr/local/www/build/head/en_US.ISO8859-1/htdocs/releases/12.0R/../../share/misc/dev.archlist.txt' was not built (made 0, flags 2009, type 3000000)!
`/usr/local/www/build/head/en_US.ISO8859-1/htdocs/releases/12.0R/../../share/misc/man2hwnotes.pl' was not built (made 0, flags 2009, type 3000000)!
*** [all] Error code 1

make[1]: stopped in /usr/local/www/build/head/en_US.ISO8859-1/htdocs/releases
1 error

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

make: stopped in /usr/local/www/build/head/en_US.ISO8859-1/htdocs
1 error

make: stopped in /usr/local/www/build/head/en_US.ISO8859-1/htdocs
        2.88 real         1.19 user         1.82 sys

latestrevision.timestamp "2017-10-05 19:06:31" 
latestrevision.committer "gjb"		
latestrevision.number "51049"