-The file ultrix/upgrade is a patch file to modify these files. The
-upgrade procedure is much the same as the installation procedure
-described above, except that you use ultrix/upgrade in step 2 instead
-of ultrix/patches, and step 4 should already have been done.
+Alternatively, edit /usr/sys/conf/mips/files.mips according to the
+differences shown in ultrix/upgrade.