{
  description = "Spacebar's services";

  inputs = {
    nixpkgs = {
      url = "github:NixOS/nixpkgs/nixos-unstable";
    };
    home-manager = {
      url = "github:nix-community/home-manager/master";
    };
    secrets = {
      url = "git+http://secrets.internal.spacebar.chat/";
      flake = false;
    };
  };

  outputs = { self, nixpkgs, home-manager, secrets }: {
    nixosConfigurations = {
      Spacebar-nginx = nixpkgs.lib.nixosSystem {
        system = "x86_64-linux";
        modules = [
          ./host/Spacebar-nginx/configuration.nix
          ./hardware-configuration.nix
          home-manager.nixosModules.home-manager
        ];
        specialArgs = {
          inherit home-manager;
          secrets = import secrets { inherit (nixpkgs) lib; };
        };
      };
      Spacebar-synapse = nixpkgs.lib.nixosSystem {
        system = "x86_64-linux";
        modules = [
          ./host/Spacebar-synapse/configuration.nix
          ./hardware-configuration.nix
          home-manager.nixosModules.home-manager
        ];
        specialArgs = {
          inherit home-manager;
          secrets = import secrets { inherit (nixpkgs) lib; };
        };
      };
      Spacebar-postgres = nixpkgs.lib.nixosSystem {
        system = "x86_64-linux";
        modules = [
          ./host/Spacebar-postgres/configuration.nix
          ./hardware-configuration.nix
          home-manager.nixosModules.home-manager
        ];
        specialArgs = {
          inherit home-manager;
          secrets = import secrets { inherit (nixpkgs) lib; };
        };
      };
      Spacebar-monitoring = nixpkgs.lib.nixosSystem {
        system = "x86_64-linux";
        modules = [
          ./host/Spacebar-monitoring/configuration.nix
          ./hardware-configuration.nix
          home-manager.nixosModules.home-manager
        ];
        specialArgs = {
          inherit home-manager;
          secrets = import secrets { inherit (nixpkgs) lib; };
        };
      };
    };
  };
}