anchor.diff:       libX11 libXmu libSM
        libXxf86vm libICE
        libXrender
  +     SDL2
      ] ++ lib.optional withNvidiaCg nvidia_cg_toolkit;
   
     meta = {
  
positive.code: , libXxf86vm, libICE
  , unzip
  , libXrender
  , withNvidiaCg ? false, nvidia_cg_toolkit
  , withSamples ? false }:
  
  
negative.code:      sha256 = "1iv6k0dwdzg5nnzw2mcgcl663q4f7p2kj7nhs8afnsikrzxxgsi4";
    };
  
    cmakeFlags = [ "-DOGRE_BUILD_DEPENDENCIES=OFF" "-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" ];
  