[Haskell-cafe] "Could not find module ... which is hidden" problem

[Don Stewart]

alexander.dunlap:
> Is the "random" package in the build-depends of your cabal file? If
> not, that's why it's hidden. Cabal hides all of the packages that
> aren't  listed in build-depends so that you can't accidentally depend
> on something that you don't list.
> 

Yes, looks like he was using HCL 1.2 -- well spotted!

Try building HCL 1.3

    http://hackage.haskell.org/cgi-bin/hackage-scripts/package/HCL