increasing ramdisk size

I'm building with debug, which makes things too big for the instkernel
ramdisk. I edited the Makefile and increased the size of IMAGESIZE but I
still get this error:

--- ramdisk.fs ---
[ "work.built" = work.built -a -f ramdisk.fs -a ! ramdisk.fs -ot work.built ]  || {  echo '#  ' " create " ramdisk/ramdisk.fs;  rm -f ramdisk.fs ramdisk.fs.tmp;  /usr/obj/tools.mac68k/bin/nbmakefs -t ffs -B be -s 2188k -F work.spec   -N /usr/src/etc -o bsize=4096,fsize=512  -o optimization=space,minfree=0  -f 15 ramdisk.fs.tmp work  && mv -f ramdisk.fs.tmp ramdisk.fs;  }
#    create  ramdisk/ramdisk.fs
Calculated size of `ramdisk.fs.tmp': 2240512 bytes, 293 inodes
Extent size set to 4096
ramdisk.fs.tmp: 2.1MB (4376 sectors) block size 4096, fragment size 512
         using 1 cylinder groups of 2.14MB, 547 blks, 320 inodes.
super-block backups (for fsck -b #) at:
  32,nbmakefs: Writing inode 277 (dir), bytes 0 + 512: No space left on device
Populating `ramdisk.fs.tmp'
*** [ramdisk.fs] Error code 1

What else do I have to change?

Thanks.

-- 
Hisashi T Fujinaka - [email protected]
BSEE + BSChem + BAEnglish + MSCS + $2.50 = coffee