For the detailed information about building and developing Netty, please visit [the developer guide](http://netty.io/wiki/developer-guide.html). This page only gives very basic information.
* If you are on Linux, you need [additional development packages](http://netty.io/wiki/native-transports.html) installed on your system, because you'll build the native transport.
Development of all versions takes place in each branch whose name is identical to `<majorVersion>.<minorVersion>`. For example, the development of 3.9 and 4.0 resides in [the branch '3.9'](https://github.com/netty/netty/tree/3.9) and [the branch '4.0'](https://github.com/netty/netty/tree/4.0) respectively.