diff --git a/nixos/modules/services/games/crossfire-server.nix b/nixos/modules/services/games/crossfire-server.nix
index 314b4bad9a29..91a684873c2a 100644
--- a/nixos/modules/services/games/crossfire-server.nix
+++ b/nixos/modules/services/games/crossfire-server.nix
@@ -1,21 +1,18 @@
 { config, lib, pkgs, ... }:
-
-with lib;
-
 let
   cfg = config.services.crossfire-server;
   serverPort = 13327;
 in {
   options.services.crossfire-server = {
-    enable = mkOption {
-      type = types.bool;
+    enable = lib.mkOption {
+      type = lib.types.bool;
       default = false;
       description = ''
         If enabled, the Crossfire game server will be started at boot.
       '';
     };
 
-    package = mkPackageOption pkgs "crossfire-server" {
+    package = lib.mkPackageOption pkgs "crossfire-server" {
       extraDescription = ''
         ::: {.note}
         This will also be used for map/arch data, if you don't change {option}`dataDir`
@@ -23,10 +20,10 @@ in {
       '';
     };
 
-    dataDir = mkOption {
-      type = types.str;
+    dataDir = lib.mkOption {
+      type = lib.types.str;
       default = "${cfg.package}/share/crossfire";
-      defaultText = literalExpression ''"''${config.services.crossfire.package}/share/crossfire"'';
+      defaultText = lib.literalExpression ''"''${config.services.crossfire.package}/share/crossfire"'';
       description = ''
         Where to load readonly data from -- maps, archetypes, treasure tables,
         and the like. If you plan to edit the data on the live server (rather
@@ -36,8 +33,8 @@ in {
       '';
     };
 
-    stateDir = mkOption {
-      type = types.str;
+    stateDir = lib.mkOption {
+      type = lib.types.str;
       default = "/var/lib/crossfire";
       description = ''
         Where to store runtime data (save files, persistent items, etc).
@@ -49,16 +46,16 @@ in {
       '';
     };
 
-    openFirewall = mkOption {
-      type = types.bool;
+    openFirewall = lib.mkOption {
+      type = lib.types.bool;
       default = false;
       description = ''
         Whether to open ports in the firewall for the server.
       '';
     };
 
-    configFiles = mkOption {
-      type = types.attrsOf types.str;
+    configFiles = lib.mkOption {
+      type = lib.types.attrsOf lib.types.str;
       description = ''
         Text to append to the corresponding configuration files. Note that the
         files given in the example are *not* the complete set of files available
@@ -70,7 +67,7 @@ in {
         overwrite the example files that come with the server, rather than being
         appended to them as the other configuration files are.
       '';
-      example = literalExpression ''
+      example = lib.literalExpression ''
         {
           dm_file = '''
             admin:secret_password:localhost
@@ -101,7 +98,7 @@ in {
     };
   };
 
-  config = mkIf cfg.enable {
+  config = lib.mkIf cfg.enable {
     users.users.crossfire = {
       description     = "Crossfire server daemon user";
       home            = cfg.stateDir;
@@ -120,8 +117,8 @@ in {
       (name: value: lib.attrsets.nameValuePair "crossfire/${name}" {
         mode = "0644";
         text =
-          (optionalString (!elem name ["motd" "news" "rules"])
-            (fileContents "${cfg.package}/etc/crossfire/${name}"))
+          (lib.optionalString (!lib.elem name ["motd" "news" "rules"])
+            (lib.fileContents "${cfg.package}/etc/crossfire/${name}"))
           + "\n${value}";
       }) ({
         ban_file = "";
@@ -129,9 +126,9 @@ in {
         exp_table = "";
         forbid = "";
         metaserver2 = "";
-        motd = fileContents "${cfg.package}/etc/crossfire/motd";
-        news = fileContents "${cfg.package}/etc/crossfire/news";
-        rules = fileContents "${cfg.package}/etc/crossfire/rules";
+        motd = lib.fileContents "${cfg.package}/etc/crossfire/motd";
+        news = lib.fileContents "${cfg.package}/etc/crossfire/news";
+        rules = lib.fileContents "${cfg.package}/etc/crossfire/rules";
         settings = "";
         stat_bonus = "";
       } // cfg.configFiles);
@@ -141,7 +138,7 @@ in {
       wantedBy      = [ "multi-user.target" ];
       after         = [ "network.target" ];
 
-      serviceConfig = mkMerge [
+      serviceConfig = lib.mkMerge [
         {
           ExecStart = "${cfg.package}/bin/crossfire-server -conf /etc/crossfire -local '${cfg.stateDir}' -data '${cfg.dataDir}'";
           Restart = "always";
@@ -149,7 +146,7 @@ in {
           Group = "crossfire";
           WorkingDirectory = cfg.stateDir;
         }
-        (mkIf (cfg.stateDir == "/var/lib/crossfire") {
+        (lib.mkIf (cfg.stateDir == "/var/lib/crossfire") {
           StateDirectory = "crossfire";
         })
       ];
@@ -170,7 +167,7 @@ in {
       '';
     };
 
-    networking.firewall = mkIf cfg.openFirewall {
+    networking.firewall = lib.mkIf cfg.openFirewall {
       allowedTCPPorts = [ serverPort ];
     };
   };