[plt-scheme] v300 on OpenBSD

Hi,

I'm trying to compile v300 of mzscheme on OpenBSD-CURRENT. I ran  
configure with --prefix=/usr/local and --disable-foreign, because I  
don't know of any good libffi port for OpenBSD. configure and make  
ran without any issue.

When I try to make install though, it gets stuck:

setup-plt: No more .zos to compile for mzc
setup-plt: No more .zos to compile for MzLib private
setup-plt: Compiling .zos used by MzLib
setup-plt:   in /usr/local/collects/mzlib/
require: unknown module: #%foreign
setup-plt: No more .zos to compile for MzScheme
setup-plt: No more .zos to compile for Net
setup-plt: No more .zos to compile for Parser-tools private-yacc
setup-plt: No more .zos to compile for Parser-tools private-lex
setup-plt: Compiling .zos used by Parser-tools
setup-plt:   in /usr/local/collects/parser-tools/

It stays at this point, compiling in Parser-tools, apparently  
indefinitely. Most of its time seems to be spent idle, in biowait().

Has anyone else come across this, or am I doing something stupid?

Cheers,

-Patrick