[Nix-dev] Updating haskell packages to ghc 6.12.2?

[Andres Loeh]

Both 6.12.1 and 6.12.2 are available, but their packages are not
currently listed by name. You can install them via attribute name,
however. For example:

nix-env -iA nixpkgs_sys.haskellPackages_ghc6121.haskellPlatform
nix-env -iA nixpkgs_sys.haskellPackages_ghc6122.haskellPlatform

You can look at haskell-packages.nix to find out which packages are
available and what their attribute names are.

Cheers,
  Andres