diff --git a/usr/lib/archboot/iso_functions b/usr/lib/archboot/iso_functions
index b081a45a2..2a3181c24 100644
--- a/usr/lib/archboot/iso_functions
+++ b/usr/lib/archboot/iso_functions
@@ -155,7 +155,7 @@ _prepare_uefi_image() {
 _grub_mkrescue() {
     ## Generate the BIOS+ISOHYBRID+UEFI CD image
     echo "Generating ${_RUNNING_ARCH} hybrid ISO ..."
-    grub-mkrescue --compress=xz --fonts="unicode" --locales="" --themes="" -o "${_IMAGENAME}.iso" "${_ISODIR}"/  "boot/grub/grub.cfg=${_GRUB_CONFIG}" &> "${_IMAGENAME}.log"
+    SOURCE_DATE_EPOCH="0" grub-mkrescue --compress=xz --fonts="unicode" --locales="" --themes="" -o "${_IMAGENAME}.iso" "${_ISODIR}"/  "boot/grub/grub.cfg=${_GRUB_CONFIG}" &> "${_IMAGENAME}.log"
 }
 
 _create_cksum() {