diff --git a/pkgs/development/libraries/ogre/default.nix b/pkgs/development/libraries/ogre/default.nix
index 89d694cc497c..aba02827665b 100644
--- a/pkgs/development/libraries/ogre/default.nix
+++ b/pkgs/development/libraries/ogre/default.nix
@@ -1,11 +1,12 @@
-{ fetchurl, stdenv
+{ fetchurl, stdenv, lib
 , cmake, mesa
 , freetype, freeimage, zziplib, randrproto, libXrandr
 , libXaw, freeglut, libXt, libpng, boost, ois
 , xproto, libX11, libXmu, libSM, pkgconfig
 , libXxf86vm, xf86vidmodeproto, libICE
 , renderproto, libXrender
-, nvidia_cg_toolkit }:
+, withNvidiaCg ? false, nvidia_cg_toolkit
+, withSamples ? false }:
 
 stdenv.mkDerivation {
   name = "ogre-1.9-hg-20160322";
@@ -15,10 +16,10 @@ stdenv.mkDerivation {
      sha256 = "0w3argjy1biaxwa3c80zxxgll67wjp8czd83p87awlcvwzdk5mz9";
   };
 
-  cmakeFlags = [ "-DOGRE_INSTALL_SAMPLES=yes" ]
-    ++ (map (x: "-DOGRE_BUILD_PLUGIN_${x}=on")
-            [ "BSP" "CG" "OCTREE" "PCZ" "PFX" ])
-    ++ (map (x: "-DOGRE_BUILD_RENDERSYSTEM_${x}=on") [ "GL" ]);
+  cmakeFlags = [ "-DOGRE_BUILD_SAMPLES=${toString withSamples}" ]
+    ++ map (x: "-DOGRE_BUILD_PLUGIN_${x}=on")
+           ([ "BSP" "OCTREE" "PCZ" "PFX" ] ++ lib.optional withNvidiaCg "CG")
+    ++ map (x: "-DOGRE_BUILD_RENDERSYSTEM_${x}=on") [ "GL" ];
 
   enableParallelBuilding = true;
 
@@ -29,8 +30,7 @@ stdenv.mkDerivation {
      xproto libX11 libXmu libSM pkgconfig
      libXxf86vm xf86vidmodeproto libICE
      renderproto libXrender
-     nvidia_cg_toolkit
-   ];
+   ] ++ lib.optional withNvidiaCg nvidia_cg_toolkit;
 
   meta = {
     description = "A 3D engine";