[Haskell-cafe] Hyperlinked source docs

[Johannes Waldmann]

As I said, I admire hyperlinked sources
in the new "base" documentation
https://hackage.haskell.org/package/base-4.8.1.0/docs/

and I want to know how I can produce such documents.
What is the magic haddock/hscolour invocation?
(I actually use standalone-haddock.)

On hackage, not every package gets the special treatment?
(In fact, only "base" does?)

- J.W.