Fix the problem of it not compling in macOS

pkgs/development/python-modules/kiwisolver/default.nix

@@ -1,6 +1,8 @@
 { lib
 , buildPythonPackage
 , fetchPypi
+, stdenv
+, libcxx
 }:
 
 buildPythonPackage rec {
@@ -11,7 +13,9 @@ buildPythonPackage rec {
     inherit pname version;
     sha256 = "ce3be5d520b4d2c3e5eeb4cd2ef62b9b9ab8ac6b6fedbaa0e39cdb6f50644278";
   };
-
+  
+  NIX_CFLAGS_COMPILE = stdenv.lib.optionalString stdenv.isDarwin "-I${libcxx}/include/c++/v1";
+  
   # Does not include tests
   doCheck = false;
 
@@ -21,4 +25,4 @@ buildPythonPackage rec {
     license = lib.licenses.bsd3;
   };
 
-}
+}