$ cabal haddock --for-hackage --hyperlink-source $ cabal upload --documentation --publish dist/pkg-0.1-docs.tar.gz

I also have projects where the normal build is fine but `stack haddock` fails on some dependency. I resorted to `stack haddock --no-haddock-deps` and at least obtained documentation for _my_ package, but with missing/broken links to the dependencies. Olaf