diff --git a/nixos/modules/installer/sd-card/sd-image.nix b/nixos/modules/installer/sd-card/sd-image.nix
index 2921491c9c96..c6b5e43ee1f0 100644
--- a/nixos/modules/installer/sd-card/sd-image.nix
+++ b/nixos/modules/installer/sd-card/sd-image.nix
@@ -225,7 +225,7 @@ in
         eval $(partx $img -o START,SECTORS --nr 1 --pairs)
         truncate -s $((SECTORS * 512)) firmware_part.img
 
-        faketime "2000-01-01 00:00:00" mkfs.vfat -i ${config.sdImage.firmwarePartitionID} -n ${config.sdImage.firmwarePartitionName} firmware_part.img
+        mkfs.vfat --invariant -i ${config.sdImage.firmwarePartitionID} -n ${config.sdImage.firmwarePartitionName} firmware_part.img
 
         # Populate the files intended for /boot/firmware
         mkdir firmware