{
  description = "A privacy-aware, distributed, open source social network.";
  inputs.myuids = {
    url = "path:../myuids";
  };
  inputs.flake-utils.url = "github:numtide/flake-utils";
  inputs.nixpkgs = {
    url = "github:NixOS/nixpkgs/840c782d507d60aaa49aa9e3f6d0b0e780912742";
    flake = false;
  };
  inputs.diaspora = {
    url = "github:diaspora/diaspora/v0.7.10.0";
    flake = false;
  };

  outputs = { self, myuids, nixpkgs, diaspora, flake-utils }: flake-utils.lib.eachSystem ["x86_64-linux"] (system:
    let
      pkgs = import nixpkgs { inherit system; overlays = []; };
      version = (builtins.fromJSON (builtins.readFile ./flake.lock)).nodes.diaspora.original.ref;
      inherit (pkgs) callPackage;
    in rec {
      packages.diaspora = callPackage ./. { src = diaspora // { inherit version; }; };
      defaultPackage = packages.diaspora;
      legacyPackages.diaspora = packages.diaspora;
      checks = {
        build = defaultPackage;
      };
    }
  ) // rec {
    overlays = {
      diaspora = final: prev: {
        diaspora = self.defaultPackage."${final.system}";
      };
    };
    overlay = overlays.diaspora;
    nixosModule = { lib, pkgs, config, ... }:
      let
        name = "diaspora";
        cfg = config.services.diaspora;

        uid = config.ids.uids.diaspora;
        gid = config.ids.gids.diaspora;
      in
        {
          options.services.diaspora = {
            enable = lib.mkEnableOption "Enable Diaspora’s service";
            user = lib.mkOption {
              type = lib.types.str;
              default = name;
              description = "User account under which Diaspora runs";
            };
            group = lib.mkOption {
              type = lib.types.str;
              default = name;
              description = "Group under which Diaspora runs";
            };
            adminEmail = lib.mkOption {
              type = lib.types.str;
              example = "admin@example.com";
              description = "Admin e-mail for Diaspora";
            };
            dataDir = lib.mkOption {
              type = lib.types.path;
              default = "/var/lib/${name}";
              description = ''
                The directory where Diaspora stores its data.
              '';
            };
            socketsDir = lib.mkOption {
              type = lib.types.path;
              default = "/run/${name}";
              description = ''
                The directory where Diaspora puts runtime files and sockets.
                '';
            };
            configDir = lib.mkOption {
              type = lib.types.path;
              description = ''
                The configuration path for Diaspora.
                '';
            };
            package = lib.mkOption {
              type = lib.types.package;
              default = pkgs.diaspora;
              description = ''
                Diaspora package to use.
                '';
            };
            withLdap = lib.mkEnableOption "Add ldap patch";
            # Output variables
            systemdStateDirectory = lib.mkOption {
              type = lib.types.str;
              # Use ReadWritePaths= instead if varDir is outside of /var/lib
              default = assert lib.strings.hasPrefix "/var/lib/" cfg.dataDir;
                lib.strings.removePrefix "/var/lib/" cfg.dataDir;
              description = ''
              Adjusted Diaspora data directory for systemd
              '';
              readOnly = true;
            };
            systemdRuntimeDirectory = lib.mkOption {
              type = lib.types.str;
              # Use ReadWritePaths= instead if socketsDir is outside of /run
              default = assert lib.strings.hasPrefix "/run/" cfg.socketsDir;
                lib.strings.removePrefix "/run/" cfg.socketsDir;
              description = ''
              Adjusted Diaspora sockets directory for systemd
              '';
              readOnly = true;
            };
            workdir = lib.mkOption {
              type = lib.types.package;
              default = cfg.package.override {
                varDir = cfg.dataDir;
                podmin_email = cfg.adminEmail;
                config_dir = cfg.configDir;
                ldap = cfg.withLdap;
              };
              description = ''
                Adjusted diaspora package with overriden values
                '';
              readOnly = true;
            };
            sockets = lib.mkOption {
              type = lib.types.attrsOf lib.types.path;
              default = {
                rails = "${cfg.socketsDir}/diaspora.sock";
                eye   = "${cfg.socketsDir}/eye.sock";
              };
              readOnly = true;
              description = ''
                Diaspora sockets
                '';
            };
            pids = lib.mkOption {
              type = lib.types.attrsOf lib.types.path;
              default = {
                eye   = "${cfg.socketsDir}/eye.pid";
              };
              readOnly = true;
              description = ''
                Diaspora pids
                '';
            };
          };

          config = lib.mkIf cfg.enable {
            nixpkgs.overlays = [ self.overlay ];
            users.users = lib.optionalAttrs (cfg.user == name) {
              "${name}" = {
                uid = myuids.lib.uids.diaspora;
                group = cfg.group;
                description = "Diaspora user";
                home = cfg.dataDir;
                packages = [ cfg.workdir.gems pkgs.nodejs cfg.workdir.gems.ruby ];
                useDefaultShell = true;
              };
            };
            users.groups = lib.optionalAttrs (cfg.group == name) {
              "${name}" = {
                gid = myuids.lib.gids.diaspora;
              };
            };

            systemd.services.diaspora = {
              description = "Diaspora";
              wantedBy = [ "multi-user.target" ];
              after = [
                "network.target" "redis.service" "postgresql.service"
              ];
              wants = [
                "redis.service" "postgresql.service"
              ];

              environment.RAILS_ENV = "production";
              environment.BUNDLE_PATH = "${cfg.workdir.gems}/${cfg.workdir.gems.ruby.gemPath}";
              environment.BUNDLE_GEMFILE = "${cfg.workdir.gems.confFiles}/Gemfile";
              environment.EYE_SOCK = cfg.sockets.eye;
              environment.EYE_PID = cfg.pids.eye;

              path = [ cfg.workdir.gems pkgs.nodejs cfg.workdir.gems.ruby pkgs.curl pkgs.which pkgs.gawk ];

              preStart = ''
                install -m 0755 -d ${cfg.dataDir}/uploads ${cfg.dataDir}/tmp ${cfg.dataDir}/log
                install -m 0700 -d ${cfg.dataDir}/tmp/pids
                if [ ! -f ${cfg.dataDir}/schedule.yml ]; then
                  echo "{}" > ${cfg.dataDir}/schedule.yml
                fi
                ./bin/bundle exec rails db:migrate
              '';

              script = ''
                exec ${cfg.workdir}/script/server
              '';

              serviceConfig = {
                User = cfg.user;
                PrivateTmp = true;
                Restart = "always";
                Type = "simple";
                WorkingDirectory = cfg.workdir;
                StateDirectory = cfg.systemdStateDirectory;
                RuntimeDirectory = cfg.systemdRuntimeDirectory;
                StandardInput = "null";
                KillMode = "control-group";
              };

              unitConfig.RequiresMountsFor = cfg.dataDir;
            };
          };
        };
  };
}