{
  description = "MaiMBot Nix Dev Env";

  inputs = {
    utils.url = "github:numtide/flake-utils";
  };

  outputs = {
    self,
    nixpkgs,
    utils,
    ...
  }:
    utils.lib.eachDefaultSystem (system: let
      pkgs = import nixpkgs {inherit system;};
      pythonPackages = pkgs.python3Packages;
    in {
      devShells.default = pkgs.mkShell {
        name = "python-venv";
        venvDir = "./.venv";
        buildInputs = with pythonPackages; [
          python
          venvShellHook
          scipy
          numpy
        ];

        postVenvCreation = ''
          unset SOURCE_DATE_EPOCH
          pip install -r requirements.txt
        '';

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