diff --git a/README.md b/README.md
index 0f9d3a4..80e7054 100644
--- a/README.md
+++ b/README.md
@@ -97,6 +97,9 @@ If you rather USB and SD card is tried before the eMMC, `pkgs.uBootPinebookProEx
 can be installed, which has an alternative patch set added on top that will
 change the boot order.
 
+The SD image is built using the "alternative boot order" u-boot. Thus, flashing
+the image to your eMMC keeps external devices bootable.
+
 
 ## Keyboard firmware
 
diff --git a/configuration.nix b/configuration.nix
index f91837d..79bae76 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -1,7 +1,7 @@
 { config, pkgs, lib, ... }:
 
 let
-  uboot = pkgs.uBootPinebookPro;
+  uboot = pkgs.uBootPinebookProExternalFirst;
 in
 {
   imports = [