virtualgl: 2.4.1 -> 2.5

pkgs/tools/X11/virtualgl/lib.nix

@@ -1,14 +1,12 @@
 { stdenv, fetchurl, cmake, mesa, libX11, libXv, libjpeg_turbo, fltk }:
 
-let
-  version = "2.4.1";
-in
-stdenv.mkDerivation {
+stdenv.mkDerivation rec {
   name = "virtualgl-lib-${version}";
+  version = "2.5";
 
   src = fetchurl {
     url = "mirror://sourceforge/virtualgl/VirtualGL-${version}.tar.gz";
-    sha256 = "0bngb4hrl0kn19qb3sa6mg6dbaahfk09gx2ng18l00xm6pmwd298";
+    sha256 = "1mnpljmx8nxnmpbx4ja430b3y535wkz185qknsxmk27yz4dbmm8l";
   };
 
   cmakeFlags = [ "-DVGL_SYSTEMFLTK=1" "-DTJPEG_LIBRARY=${libjpeg_turbo}/lib/libturbojpeg.so" ];
@@ -19,6 +17,8 @@ stdenv.mkDerivation {
 
   buildInputs = [ libjpeg_turbo mesa fltk libX11 libXv ];
 
+  enableParallelBuilding = true;
+
   meta = with stdenv.lib; {
     homepage = http://www.virtualgl.org/;
     description = "X11 GL rendering in a remote computer with full 3D hw acceleration";