anchor.diff:  , fetchFromGitHub
   , bash
   , cmake
  +, colordiff
   , flex
   , libclang
   , llvm
  
positive.code: 
  buildPythonApplication rec {
    pname = "cvise";
    version = "2.4.0";
  
    src = fetchFromGitHub {
      owner = "marxin";
      repo = "cvise";
      rev = "v${version}";
      sha256 = "0cfzikkhp91hjgxjk3izzczb8d9p8v9zsfyk6iklk92n5qf1aakq";
    };
  
    patches = [
  
negative.code:     unifdef
    ];
  
    disabledTests = [
      # Needs gcc, fails when run noninteractively (without tty).
      "test_simple_reduction"
  