{
  description = "Reproducible";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    flake-parts.url = "github:hercules-ci/flake-parts";
    poetry2nix = {
      url = "github:nix-community/poetry2nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = inputs @ {
    self,
    nixpkgs,
    flake-parts,
    poetry2nix,
    ...
  } : flake-parts.lib.mkFlake { inherit inputs; } {
    flake = {
    };
    systems = [
      "x86_64-linux"
      "x86_64-darwin"
    ];
    perSystem = { system, ... }: let
      pkgs = import nixpkgs {
        inherit system;
        config = {
          allowUnfree = true;
          cudaSupport = true;
        };
      };
      poetryLib = poetry2nix.lib.mkPoetry2Nix { inherit pkgs; };
      common = {
        python = pkgs.python311;
        projectDir = ./.;
        preferWheels = true;
        overrides = poetryLib.defaultPoetryOverrides;
      };
      application = poetryLib.mkPoetryApplication common;
      env = poetryLib.mkPoetryEnv (common // {
        editablePackageSources = let project_dir = builtins.getEnv "PROJECT_DIR"; in
        {
          reproducible = if project_dir == "" then ./. else "${project_dir}";
        };
      });
    in rec {
      packages = {
        default = application;
      };
      devShells.default = pkgs.mkShell {
        packages = [ env ];
      };
      #devShells.default = env.overrideAttrs (oldAttrs: {
      #  buildInputs = [ args.python ];
      #});
    };
  };
}