diff --git a/pkgs/by-name/gl/gltron/package.nix b/pkgs/by-name/gl/gltron/package.nix
index 39ecaceb7c9e..7ea01f14b729 100644
--- a/pkgs/by-name/gl/gltron/package.nix
+++ b/pkgs/by-name/gl/gltron/package.nix
@@ -50,6 +50,8 @@ stdenv.mkDerivation rec {
     SDL_sound
   ];
 
+  enableParallelBuilding = true;
+
   meta = {
     homepage = "http://www.gltron.org/";
     description = "Game based on the movie Tron";