anchor.diff:  
     # Copy test script into $out and run the test suite.
     checkPhase = ''
  -    cp runtests.py $out/${python.sitePackages}/numba/runtests.py
  -    ${python.interpreter} $out/${python.sitePackages}/numba/runtests.py
  +    python -m numba.runtests
     '';
     # ImportError: cannot import name '_typeconv'
     doCheck = false;
  
positive.code:     description = "Compiling Python code using LLVM";
      maintainers = with stdenv.lib.maintainers; [ fridh ];
    };
  }
negative.code: }:
  
  buildPythonPackage rec {
    version = "0.30.1";
    name = "numba-${version}";
  
    src = fetchurl {
      url = "mirror://pypi/n/numba/${name}.tar.gz";
      sha256 = "66e6254b3002f448fd212c5df4c8a69964dff9b9f315fb733e3c95e7e2b6c8fd";
    };
  
    NIX_CFLAGS_COMPILE = stdenv.lib.optionalString stdenv.isDarwin "-I${libcxx}/include/c++/v1";
  