diff --git a/README.md b/README.md
index 19822f8..e208176 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,12 @@
 # br2
 Buildroot external tree to port old sbc
+
+## Prerequisite
+Download a tarball of Buildroot and untar it
+
+## Compilation
+`make BR2_EXTERNAL=path/to/this/repo chip_defconfig`
+`make BR2_EXTERNAL=path/to/this/repo all`
+
+## Customisation
+`make BR2_EXTERNAL=path/to/this/repo menuconfig`