diff --git a/configs/nixos/hosts/pikachu/default.nix b/configs/nixos/hosts/pikachu/default.nix
index 11124a5..74067f3 100644
--- a/configs/nixos/hosts/pikachu/default.nix
+++ b/configs/nixos/hosts/pikachu/default.nix
@@ -77,18 +77,12 @@
     arguments = [
       "-nographics"
       "-batchmode"
-      "-name"
-      "main"
-      "-port"
-      "2456"
-      "-world"
-      "main"
-      "-savedir"
-      "/pikachu/media/games/servers/valheim/main"
-      "-password"
-      "foobarbaz"
-      "-public"
-      "0"
+      [ "-name" "main" ]
+      [ "-port" "2456" ]
+      [ "-world" "main" ]
+      [ "-savedir" "/pikachu/media/games/servers/valheim/main" ]
+      [ "-password" "foobarbaz" ]
+      [ "-public" "0" ]
     ];
     udpPorts = [
       2456
diff --git a/configs/nixos/modules/services/steamcmd.nix b/configs/nixos/modules/services/steamcmd.nix
index a40af94..247e338 100644
--- a/configs/nixos/modules/services/steamcmd.nix
+++ b/configs/nixos/modules/services/steamcmd.nix
@@ -8,6 +8,7 @@ let
   cfg = config.modules.services.steamcmd;
 
   libraryPath = lib.concatStringsSep ":" cfg.libraryDirs;
+  arguments = lib.flatten cfg.arguments;
 
   prepareScript = pkgs.writeShellScript "steamcmd-${cfg.serviceName}-prepare" ''
     set -eu
@@ -37,7 +38,7 @@ let
 
     cd ${lib.escapeShellArg cfg.installDir}
     ${lib.optionalString (cfg.libraryDirs != [ ]) ''export LD_LIBRARY_PATH=${lib.escapeShellArg libraryPath}:''${LD_LIBRARY_PATH-}''}
-    exec ${lib.getExe pkgs.steam-run} ${lib.escapeShellArg cfg.executable} ${lib.escapeShellArgs cfg.arguments}
+    exec ${lib.getExe pkgs.steam-run} ${lib.escapeShellArg cfg.executable} ${lib.escapeShellArgs arguments}
   '';
 
   restartCommand =
@@ -102,13 +103,15 @@ in
     };
 
     arguments = lib.mkOption {
-      type = lib.types.listOf lib.types.str;
+      type = lib.types.listOf (lib.types.oneOf [
+        lib.types.str
+        (lib.types.listOf lib.types.str)
+      ]);
       default = [ ];
       example = [
-        "-name"
-        "main"
+        [ "-name" "main" ]
       ];
-      description = "Arguments passed to the server executable.";
+      description = "Arguments passed to the server executable. Nested lists group related arguments and are flattened before execution.";
     };
 
     libraryDirs = lib.mkOption {