anchor.diff:  { stdenv, fetchurl, cmake, libGLU, libGL, libX11, xorgproto, libXt, libtiff
  +, fetchpatch
   , qtLib ? null
   , enablePython ? false, python ? null
   # Darwin support
  
positive.code:     url = "${meta.homepage}files/release/${majorVersion}/VTK-${version}.tar.gz";
      sha256 = "0nm7xwwj7rnsxjdv2ssviys8nhci4n9iiiqm2y14s520hl2dsp1d";
    };
  
    nativeBuildInputs = [ cmake ];
  
  
negative.code:     description = "Open source libraries for 3D computer graphics, image processing and visualization";
      homepage = http://www.vtk.org/;
      license = stdenv.lib.licenses.bsd3;
      maintainers = with stdenv.lib.maintainers; [ knedlsepp ];
      platforms = with stdenv.lib.platforms; unix;
    };
  }
  