Merge pull request #147807 from veprbl/pr/tokenizers_darwin_fix

pythonPackages.tokenizers: fix darwin build

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

@@ -1,9 +1,11 @@
 { lib
+, stdenv
 , fetchFromGitHub
 , fetchurl
 , buildPythonPackage
 , rustPlatform
 , setuptools-rust
+, libiconv
 , numpy
 , datasets
 , pytestCheckHook
@@ -72,6 +74,10 @@ in buildPythonPackage rec {
     rust.rustc
   ]);
 
+  buildInputs = lib.optionals stdenv.isDarwin [
+    libiconv
+  ];
+
   propagatedBuildInputs = [
     numpy
   ];