{
  description = "A comfy UI for Hashicorp Vault.";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    utils.url = "github:numtide/flake-utils";
    flake-compat = {
      url = "github:edolstra/flake-compat";
      flake = false;
    };
  };

  outputs = { self, nixpkgs, utils, ... }:
    {
      overlay = final: prev:
        let
          system = final.system;
          nodePackages = (final.callPackage ./node_nix/default.nix {
            pkgs = prev;
            system = final.system;
          }) // {
            node-sass = nodePackages.node-sass.override {
              buildInputs = [ final.pkgconfig final.libsass ];
            };
          };
          nodeDependencies = nodePackages.shell.nodeDependencies;

        in {

          vaultui = final.stdenv.mkDerivation rec {
            pname = "vaultui";
            version = "latest";

            src = ./.;

            nativeBuildInputs = with final; [ git ];

            buildPhase = ''
              ln -s ${nodeDependencies}/lib/node_modules ./node_modules
              export PATH="${nodeDependencies}/bin:$PATH"

              webpack
            '';
            installPhase = ''
              cp -r dist $out/
            '';
          };
        };
    } // utils.lib.eachSystem (utils.lib.defaultSystems) (system:
      let
        pkgs = import nixpkgs {
          inherit system;
          overlays = [ self.overlay ];
        };
      in {
        defaultPackage = self.packages."${system}".vaultui;
        packages.vaultui = pkgs.vaultui;

        devShell =
          pkgs.mkShell { inputsFrom = [ self.packages.${system}.vaultui ]; };
        lib = pkgs.vaultui.lib;
      });
}