Devenv Up Troubleshooting

flake.nix

{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.05";
    systems.url = "github:nix-systems/default";
    devenv.url = "github:cachix/devenv";
  };

  nixConfig = {
    extra-trusted-public-keys = "devenv.cachix.org-1:w1cLUi8dv3hnoSPGAuibQv+f9TZLr6cv/Hm9XgU50cw=";
    extra-substituters = "https://devenv.cachix.org";
  };

  outputs = { self, nixpkgs, devenv, systems, ... } @ inputs:
    let
      forEachSystem = nixpkgs.lib.genAttrs (import systems);
    in
    {
      devShells = forEachSystem
        (system:
          let
            pkgs = nixpkgs.legacyPackages.${system};
          in
          {
            default = devenv.lib.mkShell {
              inherit inputs pkgs;
              modules = [
                {
                  # https://devenv.sh/reference/options/
                  packages = [ pkgs.hello ];

                  enterShell = ''
                    hello
                  '';
                }
              ];
            };
          });
    };
}

log.txt

❯ mkdir direnv_test

~/src/natecox 
❯ cd direnv_test/

src/natecox/direnv_test 
❯ nix flake init --template github:cachix/devenv
wrote: /Users/ncox/src/natecox/direnv_test/.envrc
wrote: /Users/ncox/src/natecox/direnv_test/flake.nix


.devenv should be added to .gitignore

    |   echo .devenv >> .gitignore

direnv: error /Users/ncox/src/natecox/direnv_test/.envrc is blocked. Run `direnv allow` to approve its content

src/natecox/direnv_test 
❯ nix develop --impure
warning: creating lock file '/Users/ncox/src/natecox/direnv_test/flake.lock'
Hello, world!
(devenv) bash-5.2$ devenv up
error: flake 'path:/Users/ncox/src/natecox/direnv_test' does not provide attribute 'packages.aarch64-darwin.devenv-up', 'legacyPackages.aarch64-darwin.devenv-up' or 'devenv-up'
(devenv) bash-5.2$