diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -3,3 +3,22 @@
 This is a fork of Waf build system. It's not a complete build system, though.
 
 This repo is focused on developing our own modules, testing them, syncing with upstream and maybe sending back patches to original Waf in future.
+
+## Build
+
+We add some additional tools from original Waf extras and prelude to load waifulib is added.
+
+You can use `build-waf.sh` shell script(TODO: move to wscript) either prebuilt `waf` from this root repo
+
+## Running tests
+
+They are enabled by default. Just run:
+```
+$ waf configure build
+```
+
+If it succeded, then tests are not failed.
+
+## Using in your project
+
+Copy `scripts` and generated/prebuilt `waf` file to your project