{
  description = "The Co-op Cloud utility belt";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
    microvm = {
      url = "github:astro/microvm.nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs =
    {
      self,
      nixpkgs,
      microvm,
      flake-utils,
    }:
    let
      system = "x86_64-linux";
      pkgs = nixpkgs.legacyPackages.${system};
      publicKey = builtins.readFile ./tests/resources/local_integration_ssh.pub;
      privateKey = builtins.readFile ./tests/resources/local_integration_ssh;
      pathToRepo = builtins.readFile ./tests/resources/path_to_repo;
      # local DNS aliases for the server host
      extraHosts = builtins.readFile ./tests/resources/extra_hosts;
      username = "abra";
      password = "abra";
      defaultDNS = [
        # Quad9.net
        "9.9.9.9"
        "149.112.112.112"
        "2620:fe::fe"
        "2620:fe::9"
      ];
    in
    {
      nixosConfigurations = {
        abra-client = nixpkgs.lib.nixosSystem {
          system = "x86_64-linux";
          modules = [
            microvm.nixosModules.microvm
            ./nix/hosts/client/configuration.nix
          ];
          specialArgs = {
            inherit
              publicKey
              privateKey
              username
              password
              defaultDNS
              extraHosts
              pathToRepo
              ;
          };
        };
        abra-server = nixpkgs.lib.nixosSystem {
          system = "x86_64-linux";
          modules = [
            microvm.nixosModules.microvm
            ./nix/hosts/server/configuration.nix
          ];
          specialArgs = {
            inherit
              publicKey
              privateKey
              username
              password
              defaultDNS
              ;
          };
        };
      };
      nixosModules = rec {
        host = {
          imports = [
            microvm.nixosModules.host
            ./nix/modules/host.nix
          ];
        };
        default = host;
      };
      packages = rec {
        abra = pkgs.callPackage ./nix/package.nix { };
        default = abra;
      };
      apps = rec {
        abra = flake-utils.lib.mkApp { drv = self.packages.${system}.abra; };
        default = abra;
      };
      devShells.${system}.default = pkgs.mkShell {
        # testing env variables
        BATS_LIB_PATH = "~/.local/share/bats/";
        TEST_SERVER = "abra.local";
        ABRA_DIR = "$HOME/.abra_test";

        packages = with pkgs; [
          go_1_26
          gnumake
          gopls
          gettext
        ];
      };

    };
}