This might be a little bit of a hack but here is how I was able to create a simple asset pipeline when using NancyFx with Super Simple View Engine.
I am using SquishIt but I think you can do the same with Cassette.
Install-Package SquishIt -Version 0.9.5
Here is a link to a gist that we put into the bootstrapper
Here is a complete solution:
If you would like a complete sample you can checkout https://github.com/detroitpro/monafx/tree/develop
Disclaimer: The opinions expressed herein are my own personal opinions and do not represent my employer’s view in any way.