{
  description = "Informis NixOps network.";

  inputs = {
    nixpkgs.url = "nixpkgs/nixos-21.05";

    fudo-secrets.url = "path:/state/secrets";

    fudo-nixos = {
      url = "git+ssh://fudo_git@git.fudo.org:2222/fudo-nix/nixos-config.git";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    fudo-entities = {
      url = "git+ssh://fudo_git@git.fudo.org:2222/fudo-nix/entities.git";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = { self, nixpkgs, fudo-nixos, fudo-entities, fudo-secrets } @ inputs:
    with nixpkgs.lib; {
      nixopsConfigurations.default = let
        domain = "informis.land";
        description = "Informis NixOps Network";

        deployment-hosts = attrNames
          (filterAttrs
            (hostname: hostOpts:
              hostOpts.domain == domain &&
              hostOpts.nixos-system)
            fudo-entities.entities.hosts);

        deployment-config-generator = import ../common/deployment.nix;
      in deployment-config-generator {
        inherit inputs deployment-hosts description;
      };
    };
}