Index: usr.sbin/bsdinstall/scripts/zfsboot
===================================================================
--- usr.sbin/bsdinstall/scripts/zfsboot
+++ usr.sbin/bsdinstall/scripts/zfsboot
@@ -211,6 +211,7 @@
 LN_SF='ln -sf "%s" "%s"'
 MKDIR_P='mkdir -p "%s"'
 MOUNT_TYPE='mount -t %s "%s" "%s"'
+NEWFS_ESP='newfs_msdos -F %s -L "%s" "%s"'
 PRINTF_CONF="printf '%s=\"%%s\"\\\n' %s >> \"%s\""
 PRINTF_FSTAB='printf "$FSTAB_FMT" "%s" "%s" "%s" "%s" "%s" "%s" >> "%s"'
 SHELL_TRUNCATE=':> "%s"'
@@ -850,9 +851,22 @@
 			             "$GPART_ADD_ALIGN_LABEL_WITH_SIZE" \
 			             "$align_small" efiboot$index efi 200M $disk ||
 			             return $FAILURE
-			f_eval_catch $funcname gpart "$GPART_BOOTCODE_PARTONLY" \
-			             /boot/boot1.efifat 1 $disk ||
-			             return $FAILURE
+
+			f_eval_catch $funcname mkdir "$MKDIR_P" \
+				     "$BSDINSTALL_TMPETC/esp" || return $FAILURE
+			f_eval_catch $funcname newfs_msdos "$NEWFS_ESP" "16" "EFI" \
+				     "/dev/${disk}p1" || return $FAILURE
+			f_eval_catch $funcname mount "$MOUNT_TYPE" "msdosfs" \
+				     "/dev/${disk}p1" "$BSDINSTALL_TMPETC/esp" ||
+				     return $FAILURE
+			f_eval_catch $funcname mkdir "$MKDIR_P" \
+				     "${BSDINSTALL_TMPETC}/esp/efi/boot" ||
+				     return $FAILURE
+			f_eval_catch $funcname cp "cp /boot/boot1.efi \
+				     ${BSDINSTALL_TMPETC}/esp/efi/boot/${ZFSBOOT_ESP_NAME}" ||
+				     return $FAILURE
+			f_eval_catch $funcname umount "$UMOUNT" "$BSDINSTALL_TMPETC/esp" ||
+				     return $FAILURE
 		fi
 
 		if [ "$ZFSBOOT_BOOT_TYPE" = "BIOS" -o "$ZFSBOOT_BOOT_TYPE" = "BIOS+UEFI" ]; then
@@ -1565,6 +1579,24 @@
 	: ${ZFSBOOT_BOOT_TYPE:=BIOS}
 	: ${ZFSBOOT_PARTITION_SCHEME:=GPT}
 fi
+
+#
+# The EFI loader installed in the ESP (EFI System Partition) must
+# have the expected name in order to load correctly.
+#
+
+case "$( uname -m )" in
+	"arm64")
+		: ${ZFSBOOT_ESP_NAME:=BOOTaa64.efi}
+		;;
+	"arm")
+		: ${ZFSBOOT_ESP_NAME:=BOOTarm.efi}
+		;;
+	"i386")
+		: ${ZFSBOOT_ESP_NAME:=BOOTia32.efi}
+		;;
+esac
+: ${ZFSBOOT_ESP_NAME:=BOOTx64.efi}
 
 #
 # Loop over the main menu until we've accomplished what we came here to do