readme: refresh dependencies
@@ -43,11 +43,11 @@ Install dependencies:
* meson
* wayland
* wayland-protocols
-* EGL
-* GLESv2
+* EGL and GLESv2 (optional, for the GLES2 renderer)
+* Vulkan loader, headers and glslang (optional, for the Vulkan renderer)
* libdrm
* GBM
-* libinput
+* libinput (optional, for the libinput backend)
* xkbcommon
* udev
* pixman
