diff --git a/pkgs/games/openspades/default.nix b/pkgs/games/openspades/default.nix
index c2218d033d79..df987b3f856c 100644
--- a/pkgs/games/openspades/default.nix
+++ b/pkgs/games/openspades/default.nix
@@ -19,6 +19,18 @@ stdenv.mkDerivation rec {
 
   cmakeFlags = [ "-DCMAKE_BUILD_TYPE=Release" "-DOPENSPADES_INSTALL_BINARY=bin" ];
 
+  enableParallelBuilding = true;
+
+  devPack = fetchurl {
+    url = "http://yvt.jp/files/programs/osppaks/DevPaks27.zip";
+    sha256 = "05y7wldg70v5ys41fm0c8kipyspn524z4pglwr3p8h0gfz9n52v6";
+  };
+
+  preBuild = ''
+    cp $devPack Resources/DevPaks27.zip
+    unzip -u -o Resources/DevPaks27.zip -d Resources/DevPak
+  '';
+
   # OpenAL is loaded dynamicly
   postInstall = 
     if withOpenal then ''