README.md in fusuma-plugin-sendkey-0.5.1 vs README.md in fusuma-plugin-sendkey-0.6.0.pre

- old
+ new

@@ -11,10 +11,10 @@
 
 ### Install dependencies
 
 **NOTE: If you have installed ruby by apt, you must install ruby-dev.**
 ```sh
-$ sudo apt-get install libevdev-dev ruby-dev
+$ sudo apt-get install libevdev-dev ruby-dev build-essential
 ```
 
 ### Install fusuma-plugin-sendkey
 
 ```sh