Is anyone using NHRP or OpenNHRP w Linux? If so where/how did you install it?

I've been doing quite a bit of searching and NHRP (or OpenNHRP) doesn't seem to exist in any debian or ubuntu repository unless I am missing something.

I do see it is available in applications like Quagga or FRR but does anyone know how to just install it on its own? Or where to get the latest version of the code?

thanks