I’ve looked at the source code. The package functor-infix is only required for the function <$$> in Text.Kindle.Clippings.Reader.
<$$> is simply a convenience function equal to fmap . fmap. Because it’s such a small amount of code, I suggest removing the dependency on functor-infix and copying the definition of <$$> from functor-infix directly into Text/Kindle/Clippings/Reader.hs. That should make it possible to use a recent Stackage version.