shell.nix

let overlay = self: super:
{
};

in

{ nixpkgs ? import <nixpkgs> { overlays = [ overlay ]; }, compiler ? "default", doBenchmark ? false }:

let

hsOverlay = self: super: {
  haskell = super.haskell // {
    packages = super.haskell.packages // {
      "${compiler}" = super.haskell.packages."${compiler}".override {
        overrides = haskellSelf: haskellSuper: {
          random = haskellSuper.callCabal2nix "random" /Users/dom/random {};
          mwc-random = haskellSuper.callCabal2nix "mwc-random" /Users/dom/mwc-random {};
        };
      };
    };
  };
};

orig_pkgs = import nixpkgs {};
pkgs = import orig_pkgs.path { overlays = [ hsOverlay ]; };

# random = nixpkgs.haskellPackages.callCabal2nix "random" (builtins.fetchGit {
#     url = "https://github.com/lehins/random.git";
#     ref = "interface-to-performance";
#     rev = "e30bd6afedab60b5814bca3e123353cb27ba9cad";
#   }) { };

haskellDeps = ps: with ps; [
  random
  splitmix
  mwc-random
];

in

pkgs.stdenv.mkDerivation {
  name = "env";
  buildInputs = [
    (pkgs.haskellPackages.ghcWithPackages haskellDeps)
  ];
}