shell.nix

{ compiler ? "ghc7102" }:
let
  pkgs = import <nixpkgs> {};
  stdenv = pkgs.stdenv;
  cabalInstall = if compiler == "ghc763" then haskellPackages.cabal-install_1_18_1_0 else haskellPackages.cabal-install;
  ghcMod = if compiler == "ghc763" then null else haskellPackages.ghc-mod;
  haskellPackages = if compiler == "ghc763" then
      pkgs.haskell.packages.${compiler}.override {
        overrides = self: super: {
          aeson = pkgs.haskell.lib.dontCheck (pkgs.haskellPackages.aeson_0_10_0_0);
          haskell-rethinkdb = self.callPackage ~/Work/opensrc/haskell-rethinkdb {};
          #vector = self.callPackage ~/.nixpkgs/haskell/vector-0.10.12.3.nix {};
          mkDerivation = args: super.mkDerivation (args // { doHaddock = compiler != "ghc763"; });
        };
      }
    else
      pkgs.haskell.packages.${compiler}.override {
        overrides = self: super: {
          aeson = pkgs.haskell.lib.dontCheck pkgs.haskellPackages.aeson_0_10_0_0;
          cabal-helper = pkgs.haskell.lib.dontCheck pkgs.haskellPackages.cabal-helper;
          haskell-rethinkdb = self.callPackage ~/Work/opensrc/haskell-rethinkdb {};
          #vector = self.callPackage ~/.nixpkgs/haskell/vector-0.10.12.3.nix {};
        };
      };
  inputs = [
      ghcMod
      cabalInstall
  ];
in rec {
  haskellRethinkDBEnv = stdenv.lib.overrideDerivation haskellPackages.haskell-rethinkdb.env (old: {
    name = "haskell-rethinkdb-env";
    buildInputs = old.buildInputs ++ inputs;
    NIX_MYENV_NAME = "haskell-rethinkdb";
    shellHook = ''
      source ~/.bash_prompt
      # Run the old shell hook of the haskell environment
      ${old.shellHook}
    '';
  });
}