If you say $ nix-env -iA nixpkgs_sys.haskellPackages.leksah
or $ nix-env -f /etc/nixos/nixpkgs -iA haskellPackages.leksah then it will be built for the current GHC default version, which is now 7.0.4. You can also do $ nix-env -f /etc/nixos/nixpkgs -iA haskellPackages_ghc703.leksah in order to get it built with GHC-7.0.3. Alternatively, you can go via the package rather than attribute names: $ nix-env -i haskell-leksah-ghc7.0.4 $ nix-env -i haskell-leksah-ghc7.0.3 HTH, Andres _______________________________________________ nix-dev mailing list [email protected] https://mail.cs.uu.nl/mailman/listinfo/nix-dev
