diff --git a/rootfs-kernel/Makefile b/rootfs-kernel/Makefile
index 65ce6f5..6e63206 100644
--- a/rootfs-kernel/Makefile
+++ b/rootfs-kernel/Makefile
@@ -3,6 +3,8 @@
 # aarch64
 # x86_64
 ARCH=x86_64
+KERNEL_VERSION=5.11
+CONFIG_FILE=$(wildcard ./kernel-config/*.config)
 
 use-arch: ../out/arch-rootfs.ext4
 	ln -fs $< ../out/rootfs.ext4
@@ -10,19 +12,18 @@ use-arch: ../out/arch-rootfs.ext4
 use-ubuntu: ../out/ubuntu-22.04.ext4 ../out/ubuntu-22.04.id_rsa
 	ln -fs $< ../out/rootfs.ext4
 
-use-kernel: ../out/vmlinux-5.10.204
+use-kernel-amazon: ../out/vmlinux-5.10.204
 	ln -fs $< ../out/vmlinux
 
-use-kernel-custom: ../out/vmlinux-5.11
+use-kernel-custom: ../out/vmlinux-$(KERNEL_VERSION)
 	ln -fs $< ../out/vmlinux
 
+../out/vmlinux-$(KERNEL_VERSION): ./kernel.sh $(CONFIG_FILE)
+	bash ./kernel.sh $(KERNEL_VERSION)
+
 ../out/vmlinux-5.10.204:
 	wget -O $@ https://s3.amazonaws.com/spec.ccfc.min/firecracker-ci/v1.7/$(ARCH)/vmlinux-5.10.204
 
-CONFIG_FILE=$(wildcard ./kernel-config/*.config)
-../out/vmlinux-5.11: ./kernel.sh $(CONFIG_FILE)
-	bash ./kernel.sh 5.11
-
 ../out/arch-rootfs.ext4: ./arch-rootfs.sh
 	bash ./arch-rootfs.sh