diff --git a/sys/lib/dist/mkfile b/sys/lib/dist/mkfile
index ac9118ab3..703602846 100644
--- a/sys/lib/dist/mkfile
+++ b/sys/lib/dist/mkfile
@@ -92,7 +92,8 @@ cd:V:	/tmp/9front.386.iso.gz
 	@{
 	objtype=arm64
 	kernel=/n/src9/$objtype/9reform.u
-	fatfiles=(/n/src9/sys/src/boot/reform/boot.scr $kernel)
+	echo 'bootargs=local!/dev/sdM0/fs' > /env/plan9.ini
+	fatfiles=(/n/src9/sys/src/boot/reform/boot.scr /env/plan9.ini $kernel)
 	mb=1885	# storage vendors idea of 2GB
 	mk $target.$pid.disk
 	mv $target.$pid.disk $target && dd -trunc 0 -bs 1024 -oseek 33 -if /n/src9/sys/src/boot/reform/flash.bin -of $target