Based on the Eleventy Base Blog

To build locally, install Nix and then run:

• nix-build to run default.nix and output the site to your Nix store

• nix-shell to run shell.nix and get a shell where you can run serve to host the site on localhost, or yarn commands to mix up the packages. Remember to copy the contents of the modified package.json to node-deps.nix after you run yarn commands!