Add Wayland dev package dependency info to README.md. (#121)

README.md

@@ -95,20 +95,20 @@ The type erasure of View nodes is not an easy trick, as the trait has two associ
 
 ## Prerequisites
 
-### Linux
+### Linux and BSD
 
-Building and running Xilem on Linux and BSD  requires `pkg-config`, `clang`,
-and the development packages of `libxkbcommon`, `libxcb`, and `vulkan-loader`,
-to be installed.
+You need to have installed `pkg-config`, `clang`, and the development packages of `wayland`,
+`libxkbcommon`, `libxcb`, and `vulkan-loader`.
 
 Most distributions have `pkg-config` installed by default. To install the remaining packages on Fedora, run
-```
-sudo dnf install clang libxkbcommon-x11-devel libxcb-devel vulkan-loader-devel
+```sh
+sudo dnf install clang wayland-devel libxkbcommon-x11-devel libxcb-devel vulkan-loader-devel
 ```
 To install them on Debian or Ubuntu, run
+```sh
+sudo apt-get install pkg-config clang libwayland-dev libxkbcommon-x11-dev libvulkan-dev
 ```
-sudo apt-get install clang libxkbcommon-x11-dev pkg-config libvulkan-dev
-```
+
 ## License
 
 Licensed under the Apache License, Version 2.0