{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    systems.url = "github:nix-systems/default";
    devenv.url = "github:cachix/devenv/main";

    fenix.url = "github:nix-community/fenix";
    fenix.inputs.nixpkgs.follows = "nixpkgs";
  };

  outputs =
    {
      self,
      nixpkgs,
      devenv,
      systems,
      ...
    }@inputs:
    let
      forEachSystem = nixpkgs.lib.genAttrs (import systems);
    in
    {
      packages = forEachSystem (system: {
        devenv-up = self.devShells.${system}.default.config.procfileScript;
      });

      devShells = forEachSystem (
        system:
        let
          pkgs = nixpkgs.legacyPackages.${system};
        in
        {
          default = devenv.lib.mkShell {
            inherit inputs pkgs;
            modules = [
              (
                { ... }:
                {
                  dotenv.disableHint = true;

                  languages.rust = {
                    enable = true;
                    channel = "nightly";
                    components = [
                      "rustc"
                      "cargo"
                      "clippy"
                      "rustfmt"
                      "rust-analyzer"
                    ];
                  };
                }
              )
            ];
          };
        }
      );
    };
}