nanobsd and -current

I'm looking at trying to make a -current nanobsd image I can put on a 
USB dongle.

Looking at:
http://www.freebsd.org/doc/en_US.ISO8859-1/articles/nanobsd/howto.html

Using the config file example in the web site fails with

===> usr.bin/lex (install)
install -s -o root -g wheel -m 555   lex 
/usr/obj/nanobsd.julian//_.w/usr/bin
install -C -o root -g wheel -m 444  /usr/src/usr.bin/lex/FlexLexer.h 
/usr/obj/nanobsd.julian//_.w/usr/include
===> usr.bin/lex/lib (install)
install -C -o root -g wheel -m 444   libln_p.a 
/usr/obj/nanobsd.julian//_.w/usr/lib
/usr/obj/nanobsd.julian//_.w/usr/lib/libl.a -> 
/usr/obj/nanobsd.julian//_.w/usr/lib/libln.a
ln: /usr/obj/nanobsd.julian//_.w/usr/lib/libln.a: No such file or directory
*** Error code 1
1 error
*** Error code 2
1 error
*** Error code 2
1 error
*** Error code 2
1 error
*** Error code 2

has anyone used it recently?

also, the docs are not very helpful in how to cut down the size of the image

the example uses a lot of lines such as:
NO_MODULES=YES

is there a place where all these can be found?

I've looked in make.conf and /usr/src/Makefile.inc1 but there doesn't 
seem to be an
exhaustive list anywhere.

I want to slim it down to fit on a 64 MB usb key but it's not immediatly 
how to do this from the 'docs'
I'm resorting to reading the scripts and then the Makefiles but if 
anyone has this alreay all written down somewhere
that would be good.