=== modified file 'default.sysresccd-supplemented.do'
--- default.sysresccd-supplemented.do	2017-12-13 20:01:16 +0000
+++ default.sysresccd-supplemented.do	2017-12-13 18:56:18 +0000
@@ -17,11 +17,12 @@
 	output-dir $changes_dir
 	output-dir $work_dir
 
+	local fstab_add
+	fstab_add=$(build-overlay-fstab "$source_dir") || die "$0: build-overlay-fstab failed"
+	fstab-add-and-mount "$fstab_add"
+
 	mkdir -p $build_dir || \
 		die "$0: Could not create build directory ${(qqq)build_dir}"
-
-	local fstab_add
-	fstab_add=$(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	0 0" \