Trying to build -current sources, I run into this:

building llib-lc.ln
Lint pass2:
sed -e 's/mdX/md2/g' -e 's/MDX/MD2/g' /usr/src/lib/libc/md/mdX.3 > md2.3
cat /usr/src/lib/libc/md/md2.copyright >> md2.3
sed -e 's/mdX/md4/g' -e 's/MDX/MD4/g' /usr/src/lib/libc/md/mdX.3 > md4.3
cat /usr/src/lib/libc/md/md4.copyright >> md4.3
sed -e 's/mdX/md5/g' -e 's/MDX/MD5/g' /usr/src/lib/libc/md/mdX.3 > md5.3
cat /usr/src/lib/libc/md/md5.copyright >> md5.3
PATH=/usr/tools/lib/groff:${PATH} /usr/tools/bin/nbgroff -Tascii -mtty-char -man
doc /usr/src/lib/libc/db/man/btree.3  > btree.cat3.tmp && mv btree.cat3.tmp btre
e.cat3
/usr/tools/bin/nbgroff: can't find `DESC' file
/usr/tools/bin/nbgroff:fatal error: invalid device `ascii'
Abort trap - core dumped
*** Error code 134

I have the most recent source off of cvsup2.de.netbsd.org, but I have seen
that sometimes lag behind a little.  Is this something that has been fixed/
seen by others/my fault I am overlooking?

thanks