diff --git a/README.md b/README.md
index e530a0e..0a80630 100644
--- a/README.md
+++ b/README.md
@@ -75,22 +75,27 @@ Build Linux
 1. Confirm that `linux-brain/arch/arm/boot/zImage` exists.
 
 
-Bootstrap Debian Buster
------------------------
+Bootstrap Debian 10 (buster)
+----------------------------
 
-1. Partition an SD card into two partitions
+1. Partition an SD card into two partitions.
 
     - 1st: FAT32 (vfat), about 100MB
-    - 2st: ext4, fill remaining capacity
+    - 2st: ext4, fill the remaining area
 
-1. Run APT cache in background: `make aptcache`
+1. Build and copy the Linux kernel.
 
-1. Run `make debian`
+    - Run `make ldefconfig lbuild`.
+    - Copy `/linux-brain/arch/arm/boot/zImage` and `/linux-brain/arch/arm/boot/imx28-evk.dtb` into the 1st partition.
 
-1. Copy all contents in `./debian` into the 2nd partition in the card.
+1. Run APT cache in background (mandatory): `make aptcache`.
+
+1. Run `make debian`.
+
+1. Copy all contents in `./debian` into the 2nd partition.
 
     - `sudo cp -ar ./debian/* /path/to/your/sd/2nd/partition/`
-    - Please make sure that all attributes are preserved with `-a` flag
+    - Please make sure that all attributes are preserved with `-a` flag.
 
 
 Watch changes in submodules & auto-build