diff --git a/mastus/ttrss.nix b/mastus/ttrss.nix
index a15e992..4d6ca4c 100644
--- a/mastus/ttrss.nix
+++ b/mastus/ttrss.nix
@@ -14,8 +14,6 @@
         '';
       };
 
-      nixpkgs.config.packageOverrides = pkgs: { tt-rss = pkgs.callPackage ./ttrss/drv.nix {}; };
-      imports = [ ./ttrss/mod.nix ];
       services.tt-rss = {
         enable = true;
         user = "ttrss";
@@ -37,18 +35,20 @@
           log_level = notice
         '';
 
-        poolConfigs = {
-          ttrss = ''
-            listen = 9000
-            user = ttrss
-            pm = dynamic
-            pm.max_children = 75
-            pm.start_servers = 10
-            pm.min_spare_servers = 5
-            pm.max_spare_servers = 20
-            pm.max_requests = 500
-            catch_workers_output = 1
-          '';
+        pools = {
+          ttrss = {
+            listen = "9000";
+            extraConfig = ''
+              user = ttrss
+              pm = dynamic
+              pm.max_children = 75
+              pm.start_servers = 10
+              pm.min_spare_servers = 5
+              pm.max_spare_servers = 20
+              pm.max_requests = 500
+              catch_workers_output = 1
+            '';
+          };
         };
       };
 
diff --git a/mastus/ttrss/drv.nix b/mastus/ttrss/drv.nix
deleted file mode 100644
index e5bef6e..0000000
--- a/mastus/ttrss/drv.nix
+++ /dev/null
@@ -1,27 +0,0 @@
-{ stdenv, fetchgit }:
-
-stdenv.mkDerivation rec {
-  name = "tt-rss-${version}";
-  version = "16.3";
-
-  src = fetchgit {
-    url = "https://tt-rss.org/gitlab/fox/tt-rss.git";
-    rev = "refs/tags/${version}";
-    sha256 = "1584lcq6kcy9f8ik5djb9apck9hxvfpl54sn6yhl3pdfrfdj3nw5";
-  };
-
-  buildPhases = ["unpackPhase" "installPhase"];
-
-  installPhase = ''
-    mkdir $out
-    cp -ra * $out/
-  '';
-
-  meta = with stdenv.lib; {
-    description = "Web-based news feed (RSS/Atom) aggregator";
-    license = licenses.gpl2Plus;
-    homepage = http://tt-rss.org;
-    platforms = platforms.all;
-  };
-}
-
diff --git a/mastus/ttrss/mod.nix b/mastus/ttrss/mod.nix
deleted file mode 100644
index 7d38862..0000000
--- a/mastus/ttrss/mod.nix
+++ /dev/null
@@ -1,502 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-with lib;
-let
-  cfg = config.services.tt-rss;
-
-  configVersion = 26;
-
-  boolToString = b: if b then "true" else "false";
-
-  cacheDir = "cache";
-  lockDir = "lock";
-  feedIconsDir = "feed-icons";
-
-  dbPort = if cfg.database.port == null
-    then (if cfg.database.type == "pgsql" then 5432 else 3306)
-    else cfg.database.port;
-
-  tt-rss-config = pkgs.stdenv.mkDerivation {
-    name = "tt-rss-config";
-
-    buildCommand = let
-      cfgFile = pkgs.writeText "config.php" ''
-        <?php
-
-          define('PHP_EXECUTABLE', '${pkgs.php}/bin/php');
-
-          define('LOCK_DIRECTORY', '${lockDir}');
-          define('CACHE_DIR', '${cacheDir}');
-          define('ICONS_DIR', '${feedIconsDir}');
-          define('ICONS_URL', '${feedIconsDir}');
-          define('SELF_URL_PATH', '${cfg.selfUrlPath}');
-
-          define('MYSQL_CHARSET', 'UTF8');
-
-          define('DB_TYPE', '${cfg.database.type}');
-          define('DB_HOST', '${cfg.database.host}');
-          define('DB_USER', '${cfg.database.user}');
-          define('DB_NAME', '${cfg.database.name}');
-          define('DB_PASS', '${escape ["'" "\\"] cfg.database.password}');
-          define('DB_PORT', '${toString dbPort}');
-
-          define('AUTH_AUTO_CREATE', ${boolToString cfg.auth.autoCreate});
-          define('AUTH_AUTO_LOGIN', ${boolToString cfg.auth.autoLogin});
-
-          define('FEED_CRYPT_KEY', '${escape ["'" "\\"] cfg.feedCryptKey}');
-
-
-          define('SINGLE_USER_MODE', ${boolToString cfg.singleUserMode});
-
-          define('SIMPLE_UPDATE_MODE', ${boolToString cfg.simpleUpdateMode});
-          define('CHECK_FOR_UPDATES', ${boolToString cfg.checkForUpdates});
-
-          define('FORCE_ARTICLE_PURGE', ${toString cfg.forceArticlePurge});
-          define('SESSION_COOKIE_LIFETIME', ${toString cfg.sessionCookieLifetime});
-          define('ENABLE_GZIP_OUTPUT', ${boolToString cfg.enableGZipOutput});
-
-          define('PLUGINS', '${builtins.concatStringsSep "," cfg.plugins}');
-
-          define('LOG_DESTINATION', '${cfg.logDestination}');
-          define('CONFIG_VERSION', ${toString configVersion});
-
-
-          define('PUBSUBHUBBUB_ENABLED', ${boolToString cfg.pubSubHubbub.enable});
-          define('PUBSUBHUBBUB_HUB', '${cfg.pubSubHubbub.hub}');
-
-          define('SPHINX_SERVER', '${cfg.sphinx.server}');
-          define('SPHINX_INDEX', '${builtins.concatStringsSep "," cfg.sphinx.index}');
-
-          define('ENABLE_REGISTRATION', ${boolToString cfg.registration.enable});
-          define('REG_NOTIFY_ADDRESS', '${cfg.registration.notifyAddress}');
-          define('REG_MAX_USERS', ${toString cfg.registration.maxUsers});
-
-          define('SMTP_SERVER', '${cfg.email.server}');
-          define('SMTP_LOGIN', '${cfg.email.login}');
-          define('SMTP_PASSWORD', '${escape ["'" "\\"] cfg.email.password}');
-          define('SMTP_SECURE', '${cfg.email.security}');
-
-          define('SMTP_FROM_NAME', '${escape ["'" "\\"] cfg.email.fromName}');
-          define('SMTP_FROM_ADDRESS', '${escape ["'" "\\"] cfg.email.fromAddress}');
-          define('DIGEST_SUBJECT', '${escape ["'" "\\"] cfg.email.digestSubject}');
-
-      ''; in ''
-       cp "${cfgFile}" $out
-    '';
-  };
-
- in {
-
-  ###### interface
-
-  options = {
-
-    services.tt-rss = {
-
-      enable = mkEnableOption "tt-rss";
-
-      user = mkOption {
-        type = types.str;
-        example = "nginx";
-        description = ''
-          User account under which both the service and the web-application run.
-        '';
-      };
-
-      database = {
-        type = mkOption {
-          type = types.enum ["pgsql" "mysql"];
-          default = "pgsql";
-          description = ''
-            Database to store feeds. Supported are pgsql and mysql.
-          '';
-        };
-
-        host = mkOption {
-          type = types.str;
-          default = "localhost";
-          description = ''
-            Host of the database.
-          '';
-        };
-
-        name = mkOption {
-          type = types.str;
-          default = "tt_rss";
-          description = ''
-            Name of the database.
-          '';
-        };
-
-        user = mkOption {
-          type = types.str;
-          default = "tt_rss";
-          description = ''
-            The database user.
-          '';
-        };
-
-        password = mkOption {
-          type = types.nullOr types.str;
-          default = null;
-          description = ''
-            The database user's password.
-          '';
-        };
-
-        port = mkOption {
-          type = types.nullOr types.int;
-          default = null;
-          description = ''
-            The database's port. If not set, the default ports will be provided (5432
-            and 3306 for pgsql and mysql respectively).
-          '';
-        };
-      };
-
-      auth = {
-        autoCreate = mkOption {
-          type = types.bool;
-          default = true;
-          description = ''
-            Allow authentication modules to auto-create users in tt-rss internal
-            database when authenticated successfully.
-          '';
-        };
-
-        autoLogin = mkOption {
-          type = types.bool;
-          default = true;
-          description = ''
-            Automatically login user on remote or other kind of externally supplied
-            authentication, otherwise redirect to login form as normal.
-            If set to true, users won't be able to set application language
-            and settings profile.
-          '';
-        };
-      };
-
-      pubSubHubbub = {
-        hub = mkOption {
-          type = types.str;
-          default = "";
-          description = ''
-            URL to a PubSubHubbub-compatible hub server. If defined, "Published
-            articles" generated feed would automatically become PUSH-enabled.
-          '';
-        };
-
-        enable = mkOption {
-          type = types.bool;
-          default = false;
-          description = ''
-            Enable client PubSubHubbub support in tt-rss. When disabled, tt-rss
-            won't try to subscribe to PUSH feed updates.
-          '';
-        };
-      };
-
-      sphinx = {
-        server = mkOption {
-          type = types.str;
-          default = "localhost:9312";
-          description = ''
-            Hostname:port combination for the Sphinx server.
-          '';
-        };
-
-        index = mkOption {
-          type = types.listOf types.str;
-          default = ["ttrss" "delta"];
-          description = ''
-            Index names in Sphinx configuration. Example configuration
-            files are available on tt-rss wiki.
-          '';
-        };
-      };
-
-      registration = {
-        enable = mkOption {
-          type = types.bool;
-          default = false;
-          description = ''
-            Allow users to register themselves. Please be aware that allowing
-            random people to access your tt-rss installation is a security risk
-            and potentially might lead to data loss or server exploit. Disabled
-            by default.
-          '';
-        };
-
-        notifyAddress = mkOption {
-          type = types.str;
-          default = "";
-          description = ''
-            Email address to send new user notifications to.
-          '';
-        };
-
-        maxUsers = mkOption {
-          type = types.int;
-          default = 0;
-          description = ''
-            Maximum amount of users which will be allowed to register on this
-            system. 0 - no limit.
-          '';
-        };
-      };
-
-      email = {
-        server = mkOption {
-          type = types.str;
-          default = "";
-          example = "localhost:25";
-          description = ''
-            Hostname:port combination to send outgoing mail. Blank - use system
-            MTA.
-          '';
-        };
-
-        login = mkOption {
-          type = types.str;
-          default = "";
-          description = ''
-            SMTP authentication login used when sending outgoing mail.
-          '';
-        };
-
-        password = mkOption {
-          type = types.str;
-          default = "";
-          description = ''
-            SMTP authentication password used when sending outgoing mail.
-          '';
-        };
-
-        security = mkOption {
-          type = types.enum ["" "ssl" "tls"];
-          default = "";
-          description = ''
-            Used to select a secure SMTP connection. Allowed values: ssl, tls,
-            or empty.
-          '';
-        };
-
-        fromName = mkOption {
-          type = types.str;
-          default = "Tiny Tiny RSS";
-          description = ''
-            Name for sending outgoing mail. This applies to password reset
-            notifications, digest emails and any other mail.
-          '';
-        };
-
-        fromAddress = mkOption {
-          type = types.str;
-          default = "";
-          description = ''
-            Address for sending outgoing mail. This applies to password reset
-            notifications, digest emails and any other mail.
-          '';
-        };
-
-        digestSubject = mkOption {
-          type = types.str;
-          default = "[tt-rss] New headlines for last 24 hours";
-          description = ''
-            Subject line for email digests.
-          '';
-        };
-      };
-
-      sessionCookieLifetime = mkOption {
-        type = types.int;
-        default = 86400;
-        description = ''
-          Default lifetime of a session (e.g. login) cookie. In seconds,
-          0 means cookie will be deleted when browser closes.
-        '';
-      };
-
-      selfUrlPath = mkOption {
-        type = types.str;
-        description = ''
-          Full URL of your tt-rss installation. This should be set to the
-          location of tt-rss directory, e.g. http://example.org/tt-rss/
-          You need to set this option correctly otherwise several features
-          including PUSH, bookmarklets and browser integration will not work properly.
-        '';
-        example = "http://localhost/tt-rss";
-      };
-
-      feedCryptKey = mkOption {
-        type = types.str;
-        default = "";
-        description = ''
-          Key used for encryption of passwords for password-protected feeds
-          in the database. A string of 24 random characters. If left blank, encryption
-          is not used. Requires mcrypt functions.
-          Warning: changing this key will make your stored feed passwords impossible
-          to decrypt.
-        '';
-      };
-
-      singleUserMode = mkOption {
-        type = types.bool;
-        default = false;
-
-        description = ''
-          Operate in single user mode, disables all functionality related to
-          multiple users and authentication. Enabling this assumes you have
-          your tt-rss directory protected by other means (e.g. http auth).
-        '';
-      };
-
-      simpleUpdateMode = mkOption {
-        type = types.bool;
-        default = false;
-        description = ''
-          Enables fallback update mode where tt-rss tries to update feeds in
-          background while tt-rss is open in your browser.
-          If you don't have a lot of feeds and don't want to or can't run
-          background processes while not running tt-rss, this method is generally
-          viable to keep your feeds up to date.
-          Still, there are more robust (and recommended) updating methods
-          available, you can read about them here: http://tt-rss.org/wiki/UpdatingFeeds
-        '';
-      };
-
-      forceArticlePurge = mkOption {
-        type = types.int;
-        default = 0;
-        description = ''
-          When this option is not 0, users ability to control feed purging
-          intervals is disabled and all articles (which are not starred)
-          older than this amount of days are purged.
-        '';
-      };
-
-      checkForUpdates = mkOption {
-        type = types.bool;
-        default = true;
-        description = ''
-          Check for updates automatically if running Git version
-        '';
-      };
-
-      enableGZipOutput = mkOption {
-        type = types.bool;
-        default = true;
-        description = ''
-          Selectively gzip output to improve wire performance. This requires
-          PHP Zlib extension on the server.
-          Enabling this can break tt-rss in several httpd/php configurations,
-          if you experience weird errors and tt-rss failing to start, blank pages
-          after login, or content encoding errors, disable it.
-        '';
-      };
-
-      plugins = mkOption {
-        type = types.listOf types.str;
-        default = ["auth_internal" "note"];
-        description = ''
-          List of plugins to load automatically for all users.
-          System plugins have to be specified here. Please enable at least one
-          authentication plugin here (auth_*).
-          Users may enable other user plugins from Preferences/Plugins but may not
-          disable plugins specified in this list.
-          Disabling auth_internal in this list would automatically disable
-          reset password link on the login form.
-        '';
-      };
-
-      logDestination = mkOption {
-        type = types.enum ["" "sql" "syslog"];
-        default = "sql";
-        description = ''
-          Log destination to use. Possible values: sql (uses internal logging
-          you can read in Preferences -> System), syslog - logs to system log.
-          Setting this to blank uses PHP logging (usually to http server
-          error.log).
-        '';
-      };
-    };
-  };
-
-
-  ###### implementation
-
-  config = mkIf cfg.enable {
-
-    systemd.services.tt-rss = let
-      dbService = if cfg.database.type == "pgsql" then "postgresql.service" else "mysql.service";
-    in {
-
-        description = "Tiny Tiny RSS feeds update daemon";
-
-        preStart = let
-          root = "/var/lib/tt-rss";
-
-          callSql = if cfg.database.type == "pgsql" then (e: ''
-                 ${optionalString (cfg.database.password != null)
-                   "PGPASSWORD=${cfg.database.password}"} ${pkgs.postgresql95}/bin/psql \
-                     -U ${cfg.database.user}                                            \
-                     -h ${cfg.database.host}                                            \
-                     --port ${toString dbPort}                                          \
-                     -c '${e}'                                                          \
-                     ${cfg.database.name}'')
-
-               else if cfg.database.type == "mysql" then (e: ''
-                 echo '${e}' | ${pkgs.mysql}/bin/mysql                  \
-                   ${optionalString (cfg.database.password != null)
-                     "-p${cfg.database.password}"}                      \
-                   -u ${cfg.database.user}                              \
-                   -h ${cfg.database.host}                              \
-                   -P ${toString dbPort}                                \
-                   ${cfg.database.name}'')
-
-               else "";
-
-        in ''
-          rm -rf "${root}/*"
-          mkdir -m 755 -p "${root}"
-          cp -r "${pkgs.tt-rss}/"* "${root}"
-          ln -sf "${tt-rss-config}" "${root}/config.php"
-          chown -R "${cfg.user}" "${root}"
-          chmod -R 755 "${root}"
-        '' + (optionalString (cfg.database.type == "pgsql") ''
-
-          exists=$(${callSql "select count(*) > 0 from pg_tables where tableowner = user"} \
-          | tail -n+3 | head -n-2 | sed -e 's/[ \n\t]*//')
-
-          if [ "$exists" == 'f' ]; then
-            ${callSql "\\i ${pkgs.tt-rss}/schema/ttrss_schema_${cfg.database.type}.sql"}
-          else
-            echo 'The database contains some data. Leaving it as it is.'
-          fi;
-        '') + (optionalString (cfg.database.type == "mysql") ''
-
-          exists=$(${callSql "select count(*) > 0 from information_schema.tables where table_schema = schema()"} \
-          | tail -n+2 | sed -e 's/[ \n\t]*//')
-
-          if [ "$exists" == '0' ]; then
-            ${callSql "\\. ${pkgs.tt-rss}/schema/ttrss_schema_${cfg.database.type}.sql"}
-          else
-            echo 'The database contains some data. Leaving it as it is.'
-          fi;
-        '');
-
-        serviceConfig = {
-          User = "${cfg.user}";
-          ExecStart = "${pkgs.php}/bin/php /var/lib/tt-rss/update.php --daemon";
-          StandardOutput = "syslog";
-          StandardError = "syslog";
-          PermissionsStartOnly = true;
-        };
-
-        wantedBy = [ "multi-user.target" ];
-        requires = ["${dbService}"];
-        after = ["network.target" "${dbService}"];
-    };
-  };
-}
-