{
  description = "Sample Nix yarn build";
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
    gitignore = {
      url = "github:hercules-ci/gitignore.nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };
  outputs = { self, nixpkgs, flake-utils, gitignore, ... }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs { inherit system; };
      in
      with pkgs; {
        devShell = mkShell {
          buildInputs = with pkgs; [ nodejs yarn yarn2nix ];
          shellHook = ''
            export PATH="$PWD/node_modules/.bin/:$PATH"
            alias run='npm run'
            alias scripts='jq ".scripts" package.json'
          '';
        };
      });
}