diff --git a/pkgs/development/python-modules/g2pkk/default.nix b/pkgs/development/python-modules/g2pkk/default.nix
new file mode 100644
index 000000000000..98e03806d2ff
--- /dev/null
+++ b/pkgs/development/python-modules/g2pkk/default.nix
@@ -0,0 +1,36 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, jamo
+, nltk
+}:
+
+buildPythonPackage rec {
+  pname = "g2pkk";
+  version = "0.1.2";
+  format = "setuptools";
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-YarV1Btn1x3Sm4Vw/JDSyJy3ZJMXAQHZJJJklSG0R+Q=";
+  };
+
+  propagatedBuildInputs = [
+    jamo
+    nltk
+  ];
+
+  pythonImportsCheck = [
+    "g2pkk"
+  ];
+
+  doCheck = false;
+
+  meta = with lib; {
+    description = "Cross-platform g2p for Korean";
+    homepage = "https://github.com/harmlessman/g2pkk";
+    license = licenses.asl20;
+    maintainers = teams.tts.members;
+  };
+}
+
diff --git a/pkgs/development/python-modules/jamo/default.nix b/pkgs/development/python-modules/jamo/default.nix
new file mode 100644
index 000000000000..e7bebd52db44
--- /dev/null
+++ b/pkgs/development/python-modules/jamo/default.nix
@@ -0,0 +1,34 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, pytestCheckHook
+}:
+
+buildPythonPackage rec {
+  pname = "jamo";
+  version = "0.4.1";
+  format = "setuptools";
+
+  src = fetchFromGitHub {
+    owner = "JDongian";
+    repo = "python-jamo";
+    rev = "refs/tags/v${version}";
+    hash = "sha256-QHI3Rqf1aQOsW49A/qnIwRnPuerbtyerf+eWIiEvyho=";
+  };
+
+  pythonImportsCheck = [
+    "jamo"
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  meta = with lib; {
+    changelog = "https://github.com/JDongian/python-jamo/releases/tag/v${version}";
+    description = "Hangul syllable decomposition and synthesis using jamo";
+    homepage = "https://github.com/JDongian/python-jamo";
+    license = licenses.asl20;
+    maintainers = teams.tts.members;
+  };
+}
diff --git a/pkgs/development/python-modules/coqui-trainer/default.nix b/pkgs/development/python-modules/trainer/default.nix
similarity index 97%
rename from pkgs/development/python-modules/coqui-trainer/default.nix
rename to pkgs/development/python-modules/trainer/default.nix
index 4c77506b9881..627c21ee4bf0 100644
--- a/pkgs/development/python-modules/coqui-trainer/default.nix
+++ b/pkgs/development/python-modules/trainer/default.nix
@@ -16,7 +16,7 @@
 }:
 
 let
-  pname = "coqui-trainer";
+  pname = "trainer";
   version = "0.0.16";
 in
 buildPythonPackage {
diff --git a/pkgs/tools/audio/tts/default.nix b/pkgs/tools/audio/tts/default.nix
index 4e9148db9663..9b3bce6f44cf 100644
--- a/pkgs/tools/audio/tts/default.nix
+++ b/pkgs/tools/audio/tts/default.nix
@@ -32,14 +32,14 @@ let
 in
 python.pkgs.buildPythonApplication rec {
   pname = "tts";
-  version = "0.8.0";
-  format = "setuptools";
+  version = "0.9.0";
+  format = "pyproject";
 
   src = fetchFromGitHub {
     owner = "coqui-ai";
     repo = "TTS";
     rev = "v${version}";
-    sha256 = "sha256-A48L1JGXckSEaZra00ZOBVxcYJMvhpQqzE8nABaP0TY=";
+    sha256 = "sha256-p4I583Rs/4eig7cnOcJjri2ugOLAeF2nvPIvMZrN1Ss=";
   };
 
   postPatch = let
@@ -53,7 +53,6 @@ python.pkgs.buildPythonApplication rec {
       "numpy"
       "umap-learn"
       "unidic-lite"
-      "pyworld"
     ];
   in ''
     sed -r -i \
@@ -61,7 +60,6 @@ python.pkgs.buildPythonApplication rec {
         ''-e 's/${package}.*[<>=]+.*/${package}/g' \''
       ) relaxedConstraints)}
     requirements.txt
-    sed -i '/tensorboardX/d' requirements.txt
   '';
 
   nativeBuildInputs = with python.pkgs; [
@@ -71,27 +69,29 @@ python.pkgs.buildPythonApplication rec {
   propagatedBuildInputs = with python.pkgs; [
     anyascii
     coqpit
-    coqui-trainer
     flask
     fsspec
+    g2pkk
     gdown
     gruut
     inflect
+    jamo
     jieba
     librosa
     matplotlib
     mecab-python3
+    nltk
     numba
     pandas
     pypinyin
     pysbd
-    pyworld
     scipy
     soundfile
     tensorflow
     torch-bin
     torchaudio-bin
     tqdm
+    trainer
     umap-learn
     unidic-lite
     webrtcvad
@@ -127,15 +127,17 @@ python.pkgs.buildPythonApplication rec {
 
   disabledTests = [
     # Requires network acccess to download models
-    "test_synthesize"
+    "test_korean_text_to_phonemes"
+    "test_models_offset_0_step_3"
+    "test_models_offset_1_step_3"
+    "test_models_offset_2_step_3"
     "test_run_all_models"
+    "test_synthesize"
+    "test_voice_conversion"
     # Mismatch between phonemes
     "test_text_to_ids_phonemes_with_eos_bos_and_blank"
     # Takes too long
     "test_parametrized_wavernn_dataset"
-
-    # requires network
-    "test_voice_conversion"
   ];
 
   disabledTestPaths = [
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 6af64e445511..f72e8f96a538 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -1580,8 +1580,6 @@ self: super: with self; {
 
   coqpit = callPackage ../development/python-modules/coqpit { };
 
-  coqui-trainer = callPackage ../development/python-modules/coqui-trainer {};
-
   cepa = callPackage ../development/python-modules/cepa { };
 
   cerberus = callPackage ../development/python-modules/cerberus { };
@@ -3564,6 +3562,8 @@ self: super: with self; {
 
   fx2 = callPackage ../development/python-modules/fx2 { };
 
+  g2pkk = callPackage ../development/python-modules/g2pkk { };
+
   galario = toPythonModule (pkgs.galario.override {
     enablePython = true;
     pythonPackages = self;
@@ -4655,6 +4655,8 @@ self: super: with self; {
 
   jaeger-client = callPackage ../development/python-modules/jaeger-client { };
 
+  jamo = callPackage ../development/python-modules/jamo { };
+
   janus = callPackage ../development/python-modules/janus { };
 
   jaraco_classes = callPackage ../development/python-modules/jaraco_classes { };
@@ -11250,6 +11252,8 @@ self: super: with self; {
 
   trackpy = callPackage ../development/python-modules/trackpy { };
 
+  trainer = callPackage ../development/python-modules/trainer {};
+
   traitlets = callPackage ../development/python-modules/traitlets { };
 
   traits = callPackage ../development/python-modules/traits { };