I just updated the my local LWJGL 3 clone and tried to build myself.
There is one small issue: In the generated file org.lwjgl.glfw.GLFWEGL.java, there is an import to a non-existing class `org.lwjgl.egl.EGL10`.
That import also does not seem to be used, because I can freely remove it and the class still compiles.
The import is used for the javadoc links only. That file is ignored during compilation, so the (ant) build should work anyway.
But it'd be better if it wasn't generated in the first place, so I'll do that. Thanks!