[Haskell-beginners] Error building internal Scion server, how to solve it?

[Amy de Buitléir]

> Latest Release 2.0.2 on Helios 3.6.1. JDK 1.6.0_21. But the internal Scion
> server cannot be built, so I cannot compile my Haskell code.

I had a similar problem. To work around it, I manually installed the
packages, making sure that they were installed globally. For example:

cabal install --global AttoJson

Then restart Eclipse, and it should see the new packages.