anchor.diff:    ];
   
     buildInputs = [
  -    libGLU libGL
  +    libGLU
  +    libGL
       libXt
       mpi
       tbb
  
positive.code: 
  let
    version = "5.9.1";
    major = "5.9";
  
    docFiles = [
      (fetchurl {
        url = "https://www.paraview.org/paraview-downloads/download.php?submit=Download&version=v${major}&type=data&os=Sources&downloadFile=ParaViewTutorial-${version}.pdf";
        name = "Tutorial.pdf";
        sha256 = "1knpirjbz3rv8p8n03p39vv8vi5imvxakjsssqgly09g0cnsikkw";
      })
      (fetchurl {
        url = "https://www.paraview.org/paraview-downloads/download.php?submit=Download&version=v${major}&type=data&os=Sources&downloadFile=ParaViewGettingStarted-${version}.pdf";
        name = "GettingStarted.pdf";
        sha256 = "14xhlvg7s7d5amqf4qfyamx2a6b66zf4cmlfm3s7iw3jq01x1lx6";
      })
      (fetchurl {
        url = "https://www.paraview.org/paraview-downloads/download.php?submit=Download&version=v${major}&type=data&os=Sources&downloadFile=ParaViewCatalystGuide-${version}.pdf";
        name = "CatalystGuide.pdf";
        sha256 = "133vcfrbg2nh15igl51ns6gnfn1is20vq6j0rg37wha697pmcr4a";
      })
  
negative.code:     qtsvg
    ];
  
    postInstall = let docDir = "$out/share/paraview-${lib.versions.majorMinor version}/doc"; in
      lib.optionalString withDocs ''
        mkdir -p ${docDir};
        for docFile in ${lib.concatStringsSep " " docFiles}; do
  