diff -r 0281cd6caa8c rc/bin/sysupdate
--- a/rc/bin/sysupdate	Sat Oct 24 17:24:59 2020 -0700
+++ b/rc/bin/sysupdate	Sat Oct 24 21:31:14 2020 -0700
@@ -14,4 +14,11 @@
 	}
 	shift
 }
+from=`{hg id -i | sed 's/\+//g'}
 hg -v pull -u $source
+updates=`{hg log --template 'updates["{node|short}"]=1;\n' -r $from:tip}
+cat /sys/lib/breakages | awk '
+	BEGIN{'$"updates'}
+	/^commit:/{show=updates[$2]}
+	show{print $0}
+'