pandoc has HALF A GIGABYTE of dependencies. Choose better doc generators, dammit
Also, pandoc is a beast with support for almost every widely used document path. This is less a problem with Haskell, and more a problem with using a less featureful doc generator like haddock, which is actually the standard tool used for GHC and supported by Hoogle. Actually, pandoc isn't even a documentation generator but rather a document converter, so I'd imagine that haddock is still used to generate the docs and then pandoc to produce PDFs or something, in which case it *should* be an optional dependency.