diff --git a/board/keymile/km_arm/Makefile b/board/keymile/km_arm/Makefile
index 0f2018d..32eaa93 100644
--- a/board/keymile/km_arm/Makefile
+++ b/board/keymile/km_arm/Makefile
@@ -6,31 +6,12 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-include $(TOPDIR)/config.mk
 ifneq ($(OBJTREE),$(SRCTREE))
 $(shell mkdir -p $(obj)../common)
 endif
 
-LIB	= $(obj)lib$(BOARD).o
-
-COBJS	:= $(BOARD).o ../common/common.o ../common/ivm.o
+obj-y	:= km_arm.o ../common/common.o ../common/ivm.o
 
 ifdef CONFIG_KM_FPGA_CONFIG
-COBJS	+= fpga_config.o
+obj-y	+= fpga_config.o
 endif
-
-SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
-OBJS	:= $(addprefix $(obj),$(COBJS))
-SOBJS	:= $(addprefix $(obj),$(SOBJS))
-
-$(LIB):	$(obj).depend $(OBJS) $(SOBJS)
-	$(call cmd_link_o_target, $(OBJS) $(SOBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################