default.nix

let
  pkgs = import <nixpkgs> {};
  stdenv = pkgs.stdenv;

in rec {
  # GHC 7.6.3
  ghc763 = stdenv.mkDerivation rec {
    name = "ghc-763";
    buildInputs = [
      pkgs.haskell.packages.ghc763.ghc
      pkgs.haskell.packages.ghc763.cabal-install
      pkgs.haskell.packages.ghc763.cabal2nix
    ];
    NIX_MYENV_NAME = "ghc763";
    shellHook = "source ~/.bash_prompt";
  };
  # GHC 7.8.4
  ghc784 = stdenv.mkDerivation rec {
    name = "ghc-784";
    buildInputs = [
      pkgs.haskell.packages.ghc784.ghc
      pkgs.haskell.packages.ghc784.cabal-install
      pkgs.haskell.packages.ghc784.cabal2nix
    ];
    NIX_MYENV_NAME = "ghc784";
    shellHook = "source ~/.bash_prompt";
  };
  # GHC 7.10.1
  ghc7101 = stdenv.mkDerivation rec {
    name = "ghc-7101";
    buildInputs = [
      pkgs.haskell.packages.ghc7101.ghc
      pkgs.haskell.packages.ghc7101.cabal-install
      pkgs.haskell.packages.ghc7101.cabal2nix
    ];
    NIX_MYENV_NAME = "ghc7101";
    shellHook = "source ~/.bash_prompt";
  };
}