/usr/obj/sys/rump/fs/lib/liblfs/liblfs.a(lfs_vfsops.o): In function
`lfs_unmount':
lfs_vfsops.c:(.text+0x3655): undefined reference to `schedppq'

http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/ufs/lfs/lfs_vfsops.c.diff?r1=1.246&r2=1.247
might be related as it uses PRI_BIO:

sys/param.h:#define     PRI_BIO         (MAXPRI_KTHREAD - schedppq *
4)

which is defined by schedulers and exported via:
sys/sched.h:extern const int schedppq;

Thanks,
-- 
Matthew Mondor