{
  description = "Simple, functional, dependency free string manipulation in Vanilla JS";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-22.11";
    # bp.url = "github:serokell/nix-npm-buildpackage";
    bp.url = "github:sbrow/nix-npm-buildpackage";
    bp.inputs.nixpkgs.follows = "nixpkgs";
  };

  outputs = { bp, self, nixpkgs }: 
  let
    pkgs = nixpkgs.legacyPackages.x86_64-linux;
  in {
    devShells.x86_64-linux.default = pkgs.mkShell {
      buildInputs = with pkgs; [ 
        nodejs
        yarn
      ];
    };

    checks.x86_64-linux.default = bp.outputs.legacyPackages.x86_64-linux.buildYarnPackage {
        src = ./.;
        yarnBuildMore = "yarn build; yarn test";
    };
  };
}