anchor.diff:    };
   in buildPythonPackage rec {
     pname = "numpy";
  -  version = "1.19.4";
  +  version = "1.20.1";
     format = "pyproject.toml";
  +  disabled = pythonOlder "3.7";
   
     src = fetchPypi {
       inherit pname version;
       extension = "zip";
  -    sha256 = "141ec3a3300ab89c7f2b0775289954d193cc8edb621ea05f99db9cb181530512";
  +    sha256 = "02m6sms6wb4flfg8y4h0msan4y7w7qgfqxhdk21lcabhm2339iiv";
     };
   
  -  nativeBuildInputs = [ gfortran cython setuptoolsBuildHook ];
  -  buildInputs = [ blas lapack ];
  -
  -  patches = [
  -    # For compatibility with newer pytest
  -    (fetchpatch {
  -      url = "https://github.com/numpy/numpy/commit/ba315034759fbf91c61bb55390edc86e7b2627f3.patch";
  -      sha256 = "F2P5q61CyhqsZfwkLmxb7A9YdE+43FXLbQkSjop2rVY=";
  -    })
  -  ] ++ lib.optionals python.hasDistutilsCxxPatch [
  +  patches = lib.optionals python.hasDistutilsCxxPatch [
       # We patch cpython/distutils to fix https://bugs.python.org/issue1222585
       # Patching of numpy.distutils is needed to prevent it from undoing the
       # patch to distutils.
       ./numpy-distutils-C++.patch
     ];
  +
  +  nativeBuildInputs = [ gfortran cython setuptoolsBuildHook ];
  +  buildInputs = [ blas lapack ];
   
     # we default openblas to build with 64 threads
     # if a machine has more than 64 threads, it will segfault
  
positive.code: , buildPythonPackage
  , gfortran
  , hypothesis
  , pytest_5
  , blas
  , lapack
  , writeTextFile
  , isPyPy
  , cython
  , setuptoolsBuildHook
  , fetchpatch
   }:
  
  assert (!blas.isILP64) && (!lapack.isILP64);
  
  
negative.code:   doCheck = !isPyPy; # numpy 1.16+ hits a bug in pypy's ctypes, using either numpy or pypy HEAD fixes this (https://github.com/numpy/numpy/issues/13807)
  
    checkInputs = [
      pytest
      hypothesis
    ];
  
  