=== modified file 'default.sysresccd-supplemented.do'
--- default.sysresccd-supplemented.do	2017-12-13 20:07:19 +0000
+++ default.sysresccd-supplemented.do	2017-12-13 20:01:16 +0000
@@ -17,9 +17,6 @@
 	output-dir $changes_dir
 	output-dir $work_dir
 
-	touch $changes_dir/sysrcd.dat || die
-	touch $changes_dir/supplement.dat || die
-
 	mkdir -p $build_dir || \
 		die "$0: Could not create build directory ${(qqq)build_dir}"
 
@@ -27,8 +24,8 @@
 	fstab_add=$(build-overlay-fstab "$source_dir") || die "$0: build-overlay-fstab failed"
 	fstab-add-and-mount \
 		"$fstab_add" \
-		"$sysrcd_dat	$build_dir:A/sysrcd.dat	none	bind,ro	0 0" \
-		"$supplement_dat	$build_dir:A/supplement.dat	none	bind,ro	0 0"
+		"$sysrcd_dat	$build_dir:A/sysrcd.dat	none	bind	0 0" \
+		"$supplement_dat	$build_dir:A/supplement.dat	none	bind	0 0"
 
 	(cd $build_dir && md5sum sysrcd.dat >sysrcd.md5) || die
 	(cd $build_dir && md5sum supplement.dat >supplement.md5) || die