diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
index 902503335169..ba169bb5cdc2 100644
--- a/nixos/modules/module-list.nix
+++ b/nixos/modules/module-list.nix
@@ -1482,6 +1482,7 @@
   ./services/web-apps/archtika.nix
   ./services/web-apps/artalk.nix
   ./services/web-apps/audiobookshelf.nix
+  ./services/web-apps/baikal.nix
   ./services/web-apps/bluemap.nix
   ./services/web-apps/bookstack.nix
   ./services/web-apps/c2fmzq-server.nix
diff --git a/nixos/modules/services/web-apps/baikal.nix b/nixos/modules/services/web-apps/baikal.nix
new file mode 100644
index 000000000000..91a007e6e541
--- /dev/null
+++ b/nixos/modules/services/web-apps/baikal.nix
@@ -0,0 +1,141 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+let
+  common-name = "baikal";
+  cfg = config.services.baikal;
+in
+{
+  meta.maintainers = [ lib.maintainers.wrvsrx ];
+  options = {
+    services.baikal = {
+      enable = lib.mkEnableOption "baikal";
+      user = lib.mkOption {
+        type = lib.types.str;
+        default = common-name;
+        description = ''
+          User account under which the web-application run.
+        '';
+      };
+      group = lib.mkOption {
+        type = lib.types.str;
+        default = common-name;
+        description = ''
+          Group account under which the web-application run.
+        '';
+      };
+      pool = lib.mkOption {
+        type = lib.types.str;
+        default = common-name;
+        description = ''
+          Name of existing phpfpm pool that is used to run web-application.
+          If not specified a pool will be created automatically with
+          default values.
+        '';
+      };
+      virtualHost = lib.mkOption {
+        type = lib.types.nullOr lib.types.str;
+        default = common-name;
+        description = ''
+          Name of the nginx virtualhost to use and setup. If null, do not setup any virtualhost.
+        '';
+      };
+      phpPackage = lib.mkOption {
+        type = lib.types.package;
+        default = pkgs.php;
+        defaultText = "pkgs.php";
+        description = ''
+          php package to use for php fpm daemon.
+        '';
+      };
+      package = lib.mkOption {
+        type = lib.types.package;
+        default = pkgs.baikal;
+        defaultText = "pkgs.baikal";
+        description = ''
+          Baikal package to use.
+        '';
+      };
+
+    };
+  };
+  config = lib.mkIf cfg.enable {
+    services.phpfpm.pools = lib.mkIf (cfg.pool == "${common-name}") {
+      ${common-name} = {
+        inherit (cfg) user phpPackage;
+        phpEnv = {
+          "BAIKAL_PATH_CONFIG" = "/var/lib/baikal/config/";
+          "BAIKAL_PATH_SPECIFIC" = "/var/lib/baikal/specific/";
+        };
+        settings = lib.mapAttrs (name: lib.mkDefault) {
+          "listen.owner" = "nginx";
+          "listen.group" = "nginx";
+          "listen.mode" = "0600";
+          "pm" = "dynamic";
+          "pm.max_children" = 75;
+          "pm.start_servers" = 1;
+          "pm.min_spare_servers" = 1;
+          "pm.max_spare_servers" = 4;
+          "pm.max_requests" = 500;
+          "pm.process_idle_timeout" = 30;
+          "catch_workers_output" = 1;
+        };
+      };
+    };
+    services.nginx = lib.mkIf (cfg.virtualHost != null) {
+      enable = true;
+      virtualHosts."${cfg.virtualHost}" = {
+        root = "${cfg.package}/share/php/baikal/html";
+        locations = {
+          "/" = {
+            index = "index.php";
+          };
+          "/.well-known/".extraConfig = ''
+            rewrite ^/.well-known/caldav  /dav.php redirect;
+            rewrite ^/.well-known/carddav /dav.php redirect;
+          '';
+          "~ /(\.ht|Core|Specific|config)".extraConfig = ''
+            deny all;
+            return 404;
+          '';
+          "~ ^(.+\.php)(.*)$".extraConfig = ''
+            try_files $fastcgi_script_name =404;
+            include                   ${config.services.nginx.package}/conf/fastcgi.conf;
+            fastcgi_split_path_info   ^(.+\.php)(.*)$;
+            fastcgi_pass              unix:${config.services.phpfpm.pools.${cfg.pool}.socket};
+            fastcgi_param             SCRIPT_FILENAME  $document_root$fastcgi_script_name;
+            fastcgi_param             PATH_INFO        $fastcgi_path_info;
+          '';
+        };
+      };
+    };
+
+    users.users.${cfg.user} = lib.mkIf (cfg.user == common-name) {
+      description = "baikal service user";
+      isSystemUser = true;
+      inherit (cfg) group;
+    };
+
+    users.groups.${cfg.group} = lib.mkIf (cfg.group == common-name) { };
+
+    systemd.tmpfiles.settings."baikal" = builtins.listToAttrs (
+      map
+        (x: {
+          name = "/var/lib/baikal/${x}";
+          value.d = {
+            mode = "0700";
+            inherit (cfg) user group;
+          };
+        })
+        [
+          "config"
+          "specific"
+          "specific/db"
+        ]
+    );
+  };
+}