{
  inputs = { nixpkgs.url = "github:nixos/nixpkgs/nixos-23.11"; };
  outputs = { nixpkgs, ... }:

    let

      pkgs = import nixpkgs { system = "x86_64-linux"; };

    in
    rec {
      formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.nixfmt;
      devShell.x86_64-linux = pkgs.mkShell {
        name = "WRPLL-sim";
        venvDir = "./.venv";
        buildInputs = with pkgs; [
          nixpkgs-fmt
          python3Packages.python
          python3Packages.numba
          python3Packages.numpy
          python3Packages.notebook # use jupyter notebook without missing libstdc++.so.6
          python3Packages.venvShellHook

        ];

        # Only run once when venv is created
        postVenvCreation = ''
          unset SOURCE_DATE_EPOCH
          pip install -r requirements.txt
        '';

        postShellHook = ''
          # allow pip to install wheels
          unset SOURCE_DATE_EPOCH
        '';

      };
    };
}