# Pastebin Und627Jl
something like:
```
  # package overrides
  config = {
    packageOverrides = pkgs: rec {
      haskell-nix.haskellPackages = pkgs.haskell-nix.haskellPackages.override rec {
        overrides = new: old: rec { nonempty-containers = new.callHackage "nonempty-containers" "0.3.3.0" {}; };
      };
    };
  };
in
  # import nixpkgs with overlays
  import nixpkgsSrc (nixpkgsArgs // { inherit config; })
```