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diff --git a/mach/m68k2/Unisoft_bug b/mach/m68k2/Unisoft_bug
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+The following modifications to the file-system are required when
+installing ACK under UniSoft Unix:
+
+1) Create a writable directory /usr/tmp (if not present already)
+     mkdir /usr/tmp
+     chmod 777 /usr/tmp
+2) Install the file "assert.h" in /usr/include (this file is not
+   included in the Unisoft distribution, although it is standard V7 Unix).
+   The file can be copied from the ACK-tree:
+     cp /usr/em/include/assert.h /usr/include
+3) The file /lib/libln.a is called /lib/libl.a in Unisoft Unix.
+   The easiest way to fix this is to link the latter to the former:
+     ln /lib/libl.a /lib/libln.a
+
+The UniSoft C compiler we used contains a bug that will cause
+incorrect translations of the files getline.c and putline.c in
+the directory util/opt (which contains the EM Peephole Optimizer).
+To get around this bug, act as follows (after having compiled
+the entire kit):
+       1) compile the files getline.c and putline.c by hand to assembly code
+          (cc -S getline.c putline.c)
+       2) edit the files getline.s and putline.s. Look for the instruction:
+                  add.l #em_flag+ ....  ,a0
+          which appears TWICE in both files
+          and change it into:
+                  add.l #em_flag-1,a0
+       3) do cc -c getline.s
+             cc -c putline.s
+          to create new object files getline.o and putline.o
+       4) throw away the file "opt" and type make