default.nix

 let
  pkgs = import ../pkgs.nix;
  haskellOverlay = hself: hsuper: {
    my-random-fu-multivariate = hself.callPackage ./pkgs/random-fu-multivariate { };
  };

in import "${pkgs.ihaskell}/release.nix" {
  compiler = "ghc864";
  nixpkgs  = import pkgs.nixpkgs { overlays = [ haskellOverlay ]; };
  packages = self: with self; [ my-random-fu-multivariate ];
  systemPackages = self: with self; [ python2 ];
}