Yup: direnv hooks into the shell, so that it adjusts the environment variables / PATH when you `cd` into the directory. (Well, you do need to run `direnv allow

Yup: direnv hooks into the shell, so that it adjusts the environment variables / PATH when you `cd` into the directory. (Well, you do need to run `direnv allow` to indicate you trust the `.envrc` file). (Also, `nix develop` drops you into a bash shell, which is annoying coming from fish).