[Nix-dev] Conflict between ghc-7.4.1-linkdir and haskell-env-ghc-7.4.1

[Peter Simons]

Hi Aristid,

you should remove ghc-7.4.1-linkdir from your profile altogether and
install haskell-env-ghc-7.4.1 instead. See this commit for details:

 | commit 9491d08a9d98f06dfc12bdc89cb2be322947f066
 | Author: simons <simons at 70bd8c7a-acb8-0310-9f0d-9cc1c95dcdbb>
 | Date:   Wed Mar 21 11:46:15 2012 +0000
 |
 | pkgs/development/compilers/ghc/with-packages.nix: renamed this expression from "ghc-${ghc.version}-linkdir" to "haskell-env-${ghc.n
 |
 | This change allows use of the with-packages wrapper in user profiles that are
 | being updated with "nix-env -u \*". The previous name this expression generated
 | was considered by Nix to be an older version of "ghc-7.0.4-wrapper", because
 | that name has a higher priority.
 |
 | git-svn-id: https://nixos.org/repos/nix/nixpkgs/trunk@33325 70bd8c7a-acb8-0310-9f0d-9cc1c95dcdbb

Take care,
Peter