diff --git a/pkgs/development/python-modules/tokenizers/default.nix b/pkgs/development/python-modules/tokenizers/default.nix
index 55928d4fcc8e..2ff5c452a173 100644
--- a/pkgs/development/python-modules/tokenizers/default.nix
+++ b/pkgs/development/python-modules/tokenizers/default.nix
@@ -1,18 +1,24 @@
 { lib
 , stdenv
+, buildPythonPackage
+, datasets
 , fetchFromGitHub
 , fetchurl
-, buildPythonPackage
-, rustPlatform
-, setuptools-rust
 , libiconv
 , numpy
-, datasets
+, openssl
+, pkg-config
 , pytestCheckHook
+, pythonOlder
 , requests
+, rustPlatform
+, Security
+, setuptools-rust
 }:
 
 let
+  # See https://github.com/huggingface/tokenizers/blob/main/bindings/python/tests/utils.py for details
+  # about URLs and file names
   robertaVocab = fetchurl {
     url = "https://s3.amazonaws.com/models.huggingface.co/bert/roberta-base-vocab.json";
     sha256 = "0m86wpkfb2gdh9x9i9ng2fvwk1rva4p0s98xw996nrjxs7166zwy";
@@ -49,33 +55,42 @@ let
     url = "https://s3.amazonaws.com/models.huggingface.co/bert/openai-gpt-merges.txt";
     sha256 = "09a754pm4djjglv3x5pkgwd6f79i2rq8ydg0f7c3q1wmwqdbba8f";
   };
-in buildPythonPackage rec {
+in
+buildPythonPackage rec {
   pname = "tokenizers";
-  version = "unstable-2021-08-13";
+  version = "0.12.1";
+
+  disabled = pythonOlder "3.7";
 
   src = fetchFromGitHub {
     owner = "huggingface";
     repo = pname;
-    rev = "e7dd6436dd4a4ffd9e8a4f110ca68e6a38677cb6";
-    sha256 = "1p7w9a43a9h6ys5nsa4g89l65dj11037p7a1lqkj4x1yc9kv2y1r";
+    rev = "python-v${version}";
+    hash = "sha256-XIXKgcqa6ToAH4OkyaaJALOS9F+sD8d5Z71RttRcIsw=";
   };
 
   cargoDeps = rustPlatform.fetchCargoTarball {
     inherit src sourceRoot;
     name = "${pname}-${version}";
-    sha256 = "1yb4jsx6mp9jgd1g3mli6vr6mri2afnwqlmxq1rpvn34z6b3iw9q";
+    sha256 = "sha256-Euvf0LNMa2Od+6gY1Ldge/7VPrH5mJoZduRRsb+lM/E=";
   };
 
   sourceRoot = "source/bindings/python";
 
-  nativeBuildInputs = [ setuptools-rust ] ++ (with rustPlatform; [
+  nativeBuildInputs = [
+    pkg-config
+    setuptools-rust
+  ] ++ (with rustPlatform; [
     cargoSetupHook
     rust.cargo
     rust.rustc
   ]);
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = [
+    openssl
+  ] ++ lib.optionals stdenv.isDarwin [
     libiconv
+    Security
   ];
 
   propagatedBuildInputs = [
@@ -89,7 +104,7 @@ in buildPythonPackage rec {
   ];
 
   postUnpack = ''
-    # Add data files for tests, otherwise tests attempt network access.
+    # Add data files for tests, otherwise tests attempt network access
     mkdir $sourceRoot/tests/data
     ( cd $sourceRoot/tests/data
       ln -s ${robertaVocab} roberta-base-vocab.json
@@ -103,24 +118,28 @@ in buildPythonPackage rec {
       ln -s ${openaiMerges} openai-gpt-merges.txt )
   '';
 
-  postPatch = ''
-    echo 'import multiprocessing; multiprocessing.set_start_method("fork")' >> tests/__init__.py
+  preCheck = ''
+    export HOME=$(mktemp -d);
   '';
 
-  preCheck = ''
-    HOME=$TMPDIR
-  '';
+  pythonImportsCheck = [
+    "tokenizers"
+  ];
 
   disabledTests = [
-    # Downloads data using the datasets module.
+    # Downloads data using the datasets module
     "TestTrainFromIterators"
+    # Those tests require more data
+    "test_from_pretrained"
+    "test_from_pretrained_revision"
+    "test_continuing_prefix_trainer_mistmatch"
   ];
 
   meta = with lib; {
-    homepage = "https://github.com/huggingface/tokenizers";
     description = "Fast State-of-the-Art Tokenizers optimized for Research and Production";
+    homepage = "https://github.com/huggingface/tokenizers";
     license = licenses.asl20;
-    platforms = platforms.unix;
     maintainers = with maintainers; [ ];
+    platforms = platforms.unix;
   };
 }
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index d52179d4b1a5..293ddc3b869a 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -10370,7 +10370,9 @@ in {
 
   token-bucket = callPackage ../development/python-modules/token-bucket { };
 
-  tokenizers = toPythonModule (callPackage ../development/python-modules/tokenizers { });
+  tokenizers = callPackage ../development/python-modules/tokenizers {
+    inherit (pkgs.darwin.apple_sdk.frameworks) Security;
+  };
 
   tokenize-rt = toPythonModule (callPackage ../development/python-modules/tokenize-rt { });