anchor.diff:      owner = "Kitware";
       repo = "ParaView";
       rev = "v${version}";
  -    sha256 = "0h1vkgwm10mc5mnr3djp81lxr5pi0hyj776z77hiib6xm5596q9n";
  +    sha256 = "1ma02sdkz2apxnwcsyvxb26ibwnjh60p71gicw6nlp042acs6v74";
       fetchSubmodules = true;
     };
   
      cmakeFlags = [
        "-DPARAVIEW_ENABLE_PYTHON=ON"
        "-DPARAVIEW_INSTALL_DEVELOPMENT_FILES=ON"
  +     "-DPARAVIEW_ENABLE_EMBEDDED_DOCUMENTATION=OFF"
      ];
   
     # During build, binaries are called that rely on freshly built
  
positive.code: 
    enableParallelBuilding = true;
  
    buildInputs = [ cmake
     python
     mesa
     libXt
  
     # theoretically the following should be fine, but there is an error
     # due to missing libqminimal when not using qt5.full
  
     # qtbase qtx11extras qttools
     full
     ];
  
  
    meta = {
  
negative.code: {
  stdenv, fetchFromGitHub, cmake
  ,qtbase, qttools, python, mesa
  ,libXt, qtx11extras, qtxmlpatterns 
  }:
  
  stdenv.mkDerivation rec {
    name = "paraview-${version}";
    version = "5.4.1";
  
    # fetching from GitHub instead of taking an "official" source
    # tarball because of missing submodules there
  