Update README.md

Author: jwinarske

README.md

@@ -7,12 +7,11 @@ A Flutter Embedder that talks to Wayland.
 
 Build Setup Instructions
 ------------------------
-
-* Install the following packages (on Debian Stretch): `weston`, `libwayland-dev`, `cmake` and `ninja`.
+* For Ubuntu: `sudo apt-get install cmake ninja lib-wayland++ libgl1-mesa-dev libegl1-mesa-dev libgles2-mesa-dev libxkbcommon-dev rapidjson-dev`
 * From the source root `mkdir build` and move into the directory.
 * `cmake -G Ninja ../`. This should check you development environment for required packages, download the Flutter engine artifacts and unpack the same in the build directory.
 * `ninja` to build the embedder.
-* Run the embedder using `./flutter_wayland`. Make sure `weston` is running. See the instructions on running Flutter applications below.
+* Run the embedder using `./flutter_wayland`. For Ubuntu log out, select gear icon, and select `Ubuntu on Wayland`.  Login.  See the instructions on running Flutter applications below.
 
 Running Flutter Applications
 ----------------------------