blackbox on NetBSD/macppc ?

[vincentk]

i have tried to set up blackbox on an iMac rev. running NetBSD 1.5 .
while the config/compile part went just peachy, it now refuses to 
run:
Shared object "libSM.so.6" not found

any suggestions as to where i could get it (or even a workaround)?
probably relevant:
i am not (yet) running XFree, since this is only just being incorporated
into NetBSD, but rather an older PPC-X-server called Xpmac .

thanks,
vincent