{
  description = "Bredbandskollen CLI";

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

  outputs =
    { self, nixpkgs, flake-utils }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs { inherit system; };
        lib = pkgs.lib;
        version = if self ? rev && self.rev != null then self.rev else "unstable";
      in
      {
        packages = {
          default = pkgs.stdenv.mkDerivation {
            pname = "bbk";
            inherit version;
            src = self;

            nativeBuildInputs = [ pkgs.pkg-config ];
            buildInputs = [ pkgs.gnutls ];

            makeFlags = [ "GNUTLS=1" ];

            buildPhase = ''
              runHook preBuild
              make -C src/cli
              runHook postBuild
            '';

            installPhase = ''
              runHook preInstall
              install -Dm755 src/cli/cli $out/bin/bbk
              runHook postInstall
            '';

            meta = {
              description = "Swedish Internet Foundation's Bredbandskollen CLI bandwidth measurement tool";
              homepage = "https://www.bredbandskollen.se/";
              license = lib.licenses.mit;
              maintainers = with lib.maintainers; [ "Fredrik Wastring" ];
              mainProgram = "bbk";
            };
          };
          bbk = self.packages.${pkgs.system}.default;
        };

        devShells.default = pkgs.mkShell {
          buildInputs = [
            pkgs.gnutls
            pkgs.pkg-config
            pkgs.gnumake
          ];
        };
      nixosModules.bbk =
        { pkgs, ... }:
        {
          environment.systemPackages = [ self.packages.${pkgs.system}.default ];
        };
      }
    );
}