problem with build, /usr/local/bin/cscc: Argument list too long

Hi,
	I'm having trouble getting ml-pnet 0.6.8 compiled on freebsd, cscc 
dies because the
argument list is too long.

/usr/local/bin/cscc: Argument list too long
*** Target `all' for project `System.Web' failed ***
*** Project `System.Web' build failed ***
gmake[2]: *** [System.Web.dll] Error 1
gmake[2]: Leaving directory 
`/usr/ports/lang/ml-pnet/work/ml-pnet-0.6.8/class/System.Web'
gmake[1]: *** [all-recursive] Error 1
gmake[1]: Leaving directory 
`/usr/ports/lang/ml-pnet/work/ml-pnet-0.6.8/class'
gmake: *** [all-recursive] Error 1
*** Error code 2

the default max arg. on freebsd is
root@gentoo /usr/ports/lang/ml-pnet > sysctl kern.argmax
kern.argmax: 65536

Is there a workaround I could use , ie. compile only 1/2 then compile 
the other 1/2?

Michael