{
  description = "CCCB services";
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-26.05";
    #flake-utils.url = "github:numtide/flake-utils";
    agenix = {
      url = "github:ryantm/agenix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };
  outputs =
    {
      self,
      nixpkgs,
      #flake-utils,
      agenix,
    }:
    #flake-utils.lib.eachDefaultSystem (
    #  system:
    let
      pkgs = import nixpkgs { inherit system; };
      system = "x86_64-linux";
    in
    {
      formatter.${system} = pkgs.nixfmt-tree;
      apps = {
        nixos-diff = {
          type = "app";
          program = "${pkgs.writeShellScript "nixos-diff.sh" ''
            ${pkgs.git}/bin/git checkout flake.lock
            ${pkgs.git}/bin/git pull --ff-only
            ${pkgs.nix}/bin/nix flake update
            ${pkgs.nixos-rebuild}/bin/nixos-rebuild build --log-format internal-json -v |& ${pkgs.nix-output-monitor}/bin/nom --json
            ${pkgs.nvd}/bin/nvd diff /run/current-system ./result
          ''}";
        };
        deploy = {
          type = "app";
          program = "${pkgs.writeShellScript "deploy.sh" ''
            set -e
            host="''${1:?usage: nix run .#apps.deploy -- <host>}"
            ${pkgs.openssh}/bin/ssh -t "$host" 'bash -s' <<'EOF'
            set -e
            cd /etc/nixos
            nix run .#apps.nixos-diff && nixos-rebuild switch
            EOF
          ''}";
        };
      };
      devShells.${system}.default = pkgs.mkShell {
        packages = [
          (agenix.packages.${system}.default)
          pkgs.age
        ];
      };
      nixosConfigurations."matrix" = nixpkgs.lib.nixosSystem {
        #system = "x86_64-linux";d
        #pkgs = import nixpkgs { inherit system; };
        inherit system;
        modules = [
          agenix.nixosModules.default
          { environment.systemPackages = [ (agenix.packages.${system}.default) ]; }
          {
            age.secrets = {
              matrix_registration_shared_secret = {
                file = ./secrets/matrix_registration_shared_secret.age;
                mode = "440";
                owner = "matrix-synapse";
                group = "matrix-synapse";
              };
              matrix_signing_key = {
                file = ./secrets/matrix_signing_key.age;
                mode = "440";
                owner = "matrix-synapse";
                group = "matrix-synapse";
              };
              matrix_db_password = {
                file = ./secrets/matrix_db_password.age;
                mode = "440";
                owner = "matrix-synapse";
                group = "matrix-synapse";
              };
              draupnir_access_token = {
                file = ./secrets/draupnir_access_token.age;
                mode = "440";
                owner = "root";
                group = "root";
              };
            };
          }
          ./hosts/matrix
        ];
      };
      nixosConfigurations."md" = nixpkgs.lib.nixosSystem {
        #system = "x86_64-linux";
        #pkgs = import nixpkgs { inherit system; };
        inherit system;
        modules = [
          agenix.nixosModules.default
          { environment.systemPackages = [ (agenix.packages.${system}.default) ]; }
          {
            age.secrets.hedgedoc_db_password = {
              file = ./secrets/hedgedoc_db_password.age;
              owner = "hedgedoc";
              group = "hedgedoc";
              mode = "0440";
            };
          }
          ./hosts/md
        ];
      };
      nixosConfigurations."www" = nixpkgs.lib.nixosSystem {
        #system = "x86_64-linux";
        #pkgs = import nixpkgs { inherit system; };
        inherit system;
        modules = [
          agenix.nixosModules.default
          { environment.systemPackages = [ (agenix.packages.${system}.default) ]; }
          {
            age.secrets = {
              www-staging-htpasswd = {
                file = ./secrets/www-staging-htpasswd.age;
                owner = "nginx";
                group = "nginx";
                mode = "0440";
              };
              caldav-export-config = {
                file = ./secrets/caldav-export-config.age;
                owner = "root";
                group = "root";
                mode = "0440";
              };
            };
          }
          ./hosts/www
        ];
      };
      nixosConfigurations."monitoring" = nixpkgs.lib.nixosSystem {
        #system = "x86_64-linux";
        #pkgs = import nixpkgs { inherit system; };
        inherit system;
        modules = [
          agenix.nixosModules.default
          { environment.systemPackages = [ (agenix.packages.${system}.default) ]; }
          {
            age.secrets = {
              grafana_secret_key = {
                file = ./secrets/grafana_secret_key.age;
                mode = "440";
                owner = "grafana";
                group = "grafana";
              };
              grafana_admin_password = {
                file = ./secrets/grafana_admin_password.age;
                mode = "440";
                owner = "grafana";
                group = "grafana";
              };
              grafana_basic_auth = {
                file = ./secrets/grafana_basic_auth.age;
                mode = "440";
                owner = "nginx";
                group = "nginx";
              };
              postgres-grafana = {
                file = ./secrets/postgres-grafana.age;
                mode = "440";
                owner = "grafana";
                group = "grafana";
              };
              pve-exporter = {
                file = ./secrets/pve-exporter.age;
                mode = "440";
                owner = "prometheus";
                group = "prometheus";
              };
            };
          }
          ./hosts/monitoring
        ];
      };
      nixosConfigurations."sql" = nixpkgs.lib.nixosSystem {
        #system = "x86_64-linux";
        #pkgs = import nixpkgs { inherit system; };
        inherit system;
        modules = [
          agenix.nixosModules.default
          { environment.systemPackages = [ (agenix.packages.${system}.default) ]; }
          {
            age.secrets = {
              postgres-matrix-synapse = {
                file = ./secrets/postgres-matrix-synapse.age;
                owner = "postgres";
                group = "postgres";
                mode = "0400";
              };
              postgres-hedgedoc = {
                file = ./secrets/postgres-hedgedoc.age;
                owner = "postgres";
                group = "postgres";
                mode = "0400";
              };
              postgres-grafana = {
                file = ./secrets/postgres-grafana.age;
                owner = "postgres";
                group = "postgres";
                mode = "0400";
              };
              postgres-forgejo = {
                file = ./secrets/postgres-forgejo.age;
                owner = "postgres";
                group = "postgres";
                mode = "0400";
              };
              postgres-baikal = {
                file = ./secrets/postgres-baikal.age;
                owner = "postgres";
                group = "postgres";
                mode = "0400";
              };
            };
          }
          ./hosts/sql
        ];
      };
      nixosConfigurations."dav" = nixpkgs.lib.nixosSystem {
        #system = "x86_64-linux";
        #pkgs = import nixpkgs { inherit system; };
        inherit system;
        modules = [
          agenix.nixosModules.default
          { environment.systemPackages = [ (agenix.packages.${system}.default) ]; }
          {
            age.secrets = {
              #radicale-htpasswd = {
              #  file = ./secrets/radicale_htpasswd.age;
              #  owner = "radicale";
              #  group = "radicale";
              #  mode = "0400";
              #};
            };
          }
          ./hosts/dav
        ];
      };
      nixosConfigurations."git" = nixpkgs.lib.nixosSystem {
        #system = "x86_64-linux";
        #pkgs = import nixpkgs { inherit system; };
        inherit system;
        modules = [
          agenix.nixosModules.default
          { environment.systemPackages = [ (agenix.packages.${system}.default) ]; }
          {
            age.secrets = {
              postgres-forgejo = {
                file = ./secrets/postgres-forgejo.age;
                owner = "forgejo";
                group = "forgejo";
                mode = "0400";
              };
              forgejo-internal-token = {
                file = ./secrets/forgejo-internal-token.age;
                owner = "forgejo";
                group = "forgejo";
                mode = "0440";
              };
              forgejo-secret-key = {
                file = ./secrets/forgejo-secret-key.age;
                owner = "forgejo";
                group = "forgejo";
                mode = "0440";
              };
              forgejo-oauth2-jwt-secret = {
                file = ./secrets/forgejo-oauth2-jwt-secret.age;
                owner = "forgejo";
                group = "forgejo";
                mode = "0440";
              };
              forgejo-runner-token-snowden = {
                file = ./secrets/forgejo-runner-token-snowden.age;
                owner = "root";
                group = "root";
                mode = "0444";
              };
              forgejo-runner-token-snowden-env = {
                file = ./secrets/forgejo-runner-token-snowden-env.age;
                owner = "root";
                group = "root";
                mode = "0444";
              };
            };
          }
          ./hosts/git
        ];
      };
      nixosConfigurations."forgejo-runner" = nixpkgs.lib.nixosSystem {
        #system = "x86_64-linux";
        #pkgs = import nixpkgs { inherit system; };
        inherit system;
        modules = [
          agenix.nixosModules.default
          { environment.systemPackages = [ (agenix.packages.${system}.default) ]; }
          {
            age.secrets = {
              forgejo-runner-token-snowden = {
                file = ./secrets/forgejo-runner-token-snowden.age;
                owner = "root";
                group = "root";
                mode = "0444";
              };
            };
          }
          ./hosts/forgejo-runner
        ];
      };
    };
  #);
}