anchor.diff:      sha256 = "03l9frx3iw3qdsb9rrscgzdwm6872gv6mkssvn027ndf9y321xk7";
     };
   
  -  nativeBuildInputs = [ python ];
  -  buildInputs = [ llvm clang clang-unwrapped ];
  +  nativeBuildInputs = [ python3 llvm ];
  +
  +  strictDeps = true;
   
     postPatch = ''
       sed -i 's,llvm_clang =.*,llvm_clang = "${clang-unwrapped}/bin/clang",' configure.py
  
positive.code: { lib, stdenv, fetchFromGitHub, python, llvmPackages }:
  
  let
    llvm = llvmPackages.llvm;
  
negative.code:   '';
  
    configurePhase = ''
      ${python3.interpreter} ./configure.py --prefix=$out
    '';
  
    enableParallelBuilding = true;
  