anchor.diff:      zstd
       lapack
       libxml2
  -    llvm_9
  +    _llvm_9
       lz4
       xz
       gsl
  
positive.code: , noSplash ? false
  }:
  
  stdenv.mkDerivation rec {
    pname = "root";
    version = "6.24.06";
  
    src = fetchurl {
      url = "https://root.cern.ch/download/root_v${version}.source.tar.gz";
      sha256 = "sha256-kH9p9LrKHk8w7rSXlZjKdZm2qoA8oEboDiW2u6oO9SI=";
    };
  
    nativeBuildInputs = [ makeWrapper cmake pkg-config git ];
  
negative.code: 
    patches = [
      ./sw_vers.patch
    ];
  
    # Fix build against vanilla LLVM 9
  