diff --git a/cfg/plan9.ini b/cfg/plan9.ini
new file mode 100644
index 000000000..e69de29bb
diff --git a/sys/lib/dist/mkfile b/sys/lib/dist/mkfile
index 6722061d4..954d288f3 100644
--- a/sys/lib/dist/mkfile
+++ b/sys/lib/dist/mkfile
@@ -1,17 +1,12 @@
-scr=/tmp/cdstub
 iso=/tmp/9front.iso
 
 cd:V: $iso
 	
 
 clean:V:
-	rm -fr $scr $iso
+	rm -fr $iso
 
-%.iso:	/n/src9/386/9bootiso
-	mkdir -p $scr
-	cp $prereq $scr
-	cp pc/plan9.ini.cd $scr/plan9.ini
-	bind -a /n/src9 $scr
-	disk/mk9660 -9cj -B 9bootiso -p pc/cdproto -s $scr -v 'Plan 9 Front' $target
-	unmount $scr
-	rm -fr $scr
+%.iso: pc/plan9.ini.cd
+	bind $prereq /n/src9/cfg/plan9.ini
+	disk/mk9660 -9cj -B 386/9bootiso -p pc/cdproto -s /n/src9 -v 'Plan 9 Front' $target
+	unmount /n/src9/cfg/plan9.ini
diff --git a/sys/src/boot/pc/iso.c b/sys/src/boot/pc/iso.c
index 1d6bea2b7..f030be189 100644
--- a/sys/src/boot/pc/iso.c
+++ b/sys/src/boot/pc/iso.c
@@ -155,7 +155,7 @@ start(void *sp)
 	readn(&ex, origin, ex.len);
 	close(&ex);
 
-	if(isowalk(f = &ex, drive, "plan9.ini")){
+	if(isowalk(f = &ex, drive, "/cfg/plan9.ini")){
 		print("no config\r\n");
 		f = 0;
 	}
diff --git a/sys/src/boot/pc/l.s b/sys/src/boot/pc/l.s
index 23cb1539d..8691a210a 100644
--- a/sys/src/boot/pc/l.s
+++ b/sys/src/boot/pc/l.s
@@ -237,6 +237,7 @@ TEXT readsect(SB), $0
 #ifdef ISO
 
 TEXT bootname(SB), $0
+	BYTE $'3'; BYTE $'8'; BYTE $'6'; BYTE $'/';
 	BYTE $'9'; BYTE $'b'; BYTE $'o'; BYTE $'o';
 	BYTE $'t'; BYTE $'i'; BYTE $'s'; BYTE $'o';
 	BYTE $0