{
  description = "A basic dev shell";

  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
  inputs.flake-utils.url = "github:numtide/flake-utils";

  outputs = { self, nixpkgs, flake-utils, ... }:
    (flake-utils.lib.eachDefaultSystem (system:
      let pkgs = import nixpkgs { inherit system; };
      in {
        devShells.default =
          pkgs.mkShell { buildInputs = [ pkgs.python39 pkgs.poetry ]; };
      }));
}