Index: head/sys/boot/efi/boot1/generate-fat.sh
===================================================================
--- head/sys/boot/efi/boot1/generate-fat.sh
+++ head/sys/boot/efi/boot1/generate-fat.sh
@@ -44,6 +44,8 @@
 
 # Make a dummy file for boot1
 echo 'Boot1 START' | dd of=stub/efi/boot/$FILENAME cbs=$BOOT1_SIZE count=1 conv=block
+# Provide a fallback startup.nsh
+echo $FILENAME > stub/efi/boot/startup.nsh
 
 umount stub
 mdconfig -d -u $DEVICE