Subject: [bug#27661] [PATCH] build: Make ISO-9660 image bootable from USB flash drive.

From: Danny Milosavljevic <[email-masked]>
Date: Wed, 12 Jul 2017 09:05:08 +0200

* gnu/build/vm.scm (make-iso9660-image): Make image bootable from USB flash
drive.
---
 gnu/build/vm.scm | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gnu/build/vm.scm b/gnu/build/vm.scm
index 2d41c5756..b686ef298 100644
--- a/gnu/build/vm.scm
+++ b/gnu/build/vm.scm
@@ -367,6 +367,8 @@ Grub configuration and OS-DRV as the stuff in it."
                             "var=/tmp/root/var"
                             "run=/tmp/root/run"
                             "--"
+                            ;; Store two copies of the headers
+                            "-boot_image" "any" "partition_offset=16"
                             "-volid" ,(string-upcase volume-id)
                             ,@(if volume-uuid
                                   `("-volume_date" "uuid"