The command cabal haddock has very useful --hyperlink-source option.
I would like to have the source hyperlinked when building documentation with cabal install.
The ticket #517 seems to be just about it: http://hackage.haskell.org/trac/hackage/ticket/517
However, perhaps it is possible to set this flag via ~/.cabal/config file?
If not, how can I get working cabal-install build with the patch from #517 without installing Cabal-1.9, which is currently mandatory (due to one patch from December)?
Currently you cannot get the equivalent of the --hyperlink-source option when using the "all in one" cabal install command. The ticket you cite is exactly about this issue.