anchor.diff:  
     postPatch = ''
       substituteInPlace setup.py \
  -      --replace "blis>=0.4.0,<0.5.0" "blis>=0.4.0,<1.0" \
  +      --replace "blis>=0.4.0,<0.8.0" "blis>=0.4.0,<1.0" \
         --replace "catalogue>=0.0.7,<1.1.0" "catalogue>=0.0.7,<3.0" \
         --replace "plac>=0.9.6,<1.2.0" "plac>=0.9.6,<2.0" \
         --replace "srsly>=0.0.6,<1.1.0" "srsly>=0.0.6,<3.0"
  
positive.code:    blis
     catalogue
     cymem
     cython
     murmurhash
     numpy
     plac
  
negative.code: 
  buildPythonPackage rec {
    pname = "thinc";
    version = "7.4.5";
  
    src = fetchPypi {
      inherit pname version;
      sha256 = "5743fde41706252ec6ce4737c68d3505f7e1cc3d4431174a17149838d594f8cb";
    };
  
    buildInputs = [ cython ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
      Accelerate CoreFoundation CoreGraphics CoreVideo
    ]);
  
  