{
  description = "a cute metasearch engine";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";

    crane.url = "github:ipetkov/crane";

    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, crane, flake-utils, ... }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = nixpkgs.legacyPackages.${system};

        craneLib = crane.mkLib pkgs;

        assetFilter = path: _type: (pkgs.lib.strings.hasPrefix (toString ./src/web/assets) path);
        sourceFilter = path: type: (craneLib.filterCargoSources path type) || (assetFilter path type);

        # Common arguments can be set here to avoid repeating them later
        # Note: changes here will rebuild all dependency crates
        commonArgs = {
          src = pkgs.lib.cleanSourceWith {
            src = ./.;
            filter = sourceFilter;
            name = "source"; # Be reproducible, regardless of the directory name
          };
          strictDeps = true;

          buildInputs = [
            # Add additional build inputs here
          ];
        };

        metasearch2 = craneLib.buildPackage (commonArgs // {
          cargoArtifacts = craneLib.buildDepsOnly commonArgs;

          # Additional environment variables or build phases/hooks can be set
          # here *without* rebuilding all dependency crates
          # MY_CUSTOM_VAR = "some value";
        });
      in
      {
        checks = {
          inherit metasearch2;
        };

        packages.default = metasearch2;

        apps.default = flake-utils.lib.mkApp {
          drv = metasearch2;
        };

        devShells.default = craneLib.devShell {
          # Inherit inputs from checks.
          checks = self.checks.${system};

          # Additional dev-shell environment variables can be set directly
          # MY_CUSTOM_DEVELOPMENT_VAR = "something else";

          # Extra inputs can be added here; cargo and rustc are provided by default.
          packages = [
            # pkgs.ripgrep
          ];
        };
      });
}