diff --git a/backend/python/chatterbox/install.sh b/backend/python/chatterbox/install.sh
index 04d76fd5b..c72445f06 100755
--- a/backend/python/chatterbox/install.sh
+++ b/backend/python/chatterbox/install.sh
@@ -23,3 +23,15 @@ fi
 
 
 installRequirements
+
+# chatterbox-tts upstream pulls `russian-text-stresser` (unpinned git URL) which
+# transitively pins spacy==3.6.* and other ancient packages. That cascade forces
+# pip to backtrack through Jinja2/MarkupSafe/omegaconf/ruamel.yaml into Python-2-era
+# sdists that no longer build. We install chatterbox-tts itself with --no-deps and
+# list its real runtime deps in requirements-*.txt instead.
+echo "Installing chatterbox-tts with --no-deps"
+if [ "x${USE_PIP}" == "xtrue" ]; then
+    pip install ${EXTRA_PIP_INSTALL_FLAGS:-} --no-deps "chatterbox-tts@git+https://git@github.com/mudler/chatterbox.git@faster"
+else
+    uv pip install ${EXTRA_PIP_INSTALL_FLAGS:-} --no-deps "chatterbox-tts@git+https://git@github.com/mudler/chatterbox.git@faster"
+fi
diff --git a/backend/python/chatterbox/requirements-cpu.txt b/backend/python/chatterbox/requirements-cpu.txt
index 998edb42c..3ad933292 100644
--- a/backend/python/chatterbox/requirements-cpu.txt
+++ b/backend/python/chatterbox/requirements-cpu.txt
@@ -4,9 +4,16 @@ torch
 torchaudio
 numpy>=1.24.0,<1.26.0
 transformers
-# Pin omegaconf so pip doesn't backtrack into 1.x sdists (whose
-# ruamel.yaml<0.15 dep has a Python-2-only setup.py and fails to build).
+# chatterbox-tts itself is installed with --no-deps in install.sh.
+# These are its real runtime deps, mirroring upstream's pyproject.toml
+# minus russian-text-stresser (whose ancient pins break the resolver).
 omegaconf==2.3.0
-# https://github.com/mudler/LocalAI/pull/6240#issuecomment-3329518289
-chatterbox-tts@git+https://git@github.com/mudler/chatterbox.git@faster
-#chatterbox-tts==0.1.4
\ No newline at end of file
+resampy==0.4.3
+librosa
+s3tokenizer
+diffusers
+resemble-perth==1.0.1
+conformer
+safetensors
+spacy-pkuseg
+pykakasi==2.3.0
\ No newline at end of file
diff --git a/backend/python/chatterbox/requirements-cublas12.txt b/backend/python/chatterbox/requirements-cublas12.txt
index df9c365aa..2467c9162 100644
--- a/backend/python/chatterbox/requirements-cublas12.txt
+++ b/backend/python/chatterbox/requirements-cublas12.txt
@@ -2,9 +2,17 @@ torch
 torchaudio
 transformers
 numpy>=1.24.0,<1.26.0
-# Pin omegaconf so pip doesn't backtrack into 1.x sdists (whose
-# ruamel.yaml<0.15 dep has a Python-2-only setup.py and fails to build).
+# chatterbox-tts itself is installed with --no-deps in install.sh.
+# These are its real runtime deps, mirroring upstream's pyproject.toml
+# minus russian-text-stresser (whose ancient pins break the resolver).
 omegaconf==2.3.0
-# https://github.com/mudler/LocalAI/pull/6240#issuecomment-3329518289
-chatterbox-tts@git+https://git@github.com/mudler/chatterbox.git@faster
+resampy==0.4.3
+librosa
+s3tokenizer
+diffusers
+resemble-perth==1.0.1
+conformer
+safetensors
+spacy-pkuseg
+pykakasi==2.3.0
 accelerate
diff --git a/backend/python/chatterbox/requirements-cublas13.txt b/backend/python/chatterbox/requirements-cublas13.txt
index 7d06e4c48..bd7b80c6e 100644
--- a/backend/python/chatterbox/requirements-cublas13.txt
+++ b/backend/python/chatterbox/requirements-cublas13.txt
@@ -3,9 +3,17 @@ torch
 torchaudio
 transformers
 numpy>=1.24.0,<1.26.0
-# Pin omegaconf so pip doesn't backtrack into 1.x sdists (whose
-# ruamel.yaml<0.15 dep has a Python-2-only setup.py and fails to build).
+# chatterbox-tts itself is installed with --no-deps in install.sh.
+# These are its real runtime deps, mirroring upstream's pyproject.toml
+# minus russian-text-stresser (whose ancient pins break the resolver).
 omegaconf==2.3.0
-# https://github.com/mudler/LocalAI/pull/6240#issuecomment-3329518289
-chatterbox-tts@git+https://git@github.com/mudler/chatterbox.git@faster
+resampy==0.4.3
+librosa
+s3tokenizer
+diffusers
+resemble-perth==1.0.1
+conformer
+safetensors
+spacy-pkuseg
+pykakasi==2.3.0
 accelerate
diff --git a/backend/python/chatterbox/requirements-hipblas.txt b/backend/python/chatterbox/requirements-hipblas.txt
index ba2cb0740..6647da2cf 100644
--- a/backend/python/chatterbox/requirements-hipblas.txt
+++ b/backend/python/chatterbox/requirements-hipblas.txt
@@ -3,9 +3,17 @@ torch==2.10.0+rocm7.0
 torchaudio==2.10.0+rocm7.0
 transformers
 numpy>=1.24.0,<1.26.0
-# Pin omegaconf so pip doesn't backtrack into 1.x sdists (whose
-# ruamel.yaml<0.15 dep has a Python-2-only setup.py and fails to build).
+# chatterbox-tts itself is installed with --no-deps in install.sh.
+# These are its real runtime deps, mirroring upstream's pyproject.toml
+# minus russian-text-stresser (whose ancient pins break the resolver).
 omegaconf==2.3.0
-# https://github.com/mudler/LocalAI/pull/6240#issuecomment-3329518289
-chatterbox-tts@git+https://git@github.com/mudler/chatterbox.git@faster
+resampy==0.4.3
+librosa
+s3tokenizer
+diffusers
+resemble-perth==1.0.1
+conformer
+safetensors
+spacy-pkuseg
+pykakasi==2.3.0
 accelerate
diff --git a/backend/python/chatterbox/requirements-intel.txt b/backend/python/chatterbox/requirements-intel.txt
index f99303bb8..6578cb1af 100644
--- a/backend/python/chatterbox/requirements-intel.txt
+++ b/backend/python/chatterbox/requirements-intel.txt
@@ -3,11 +3,19 @@ torch
 torchaudio
 transformers
 numpy>=1.24.0,<1.26.0
-# Pin omegaconf so pip doesn't backtrack into 1.x sdists (whose
-# ruamel.yaml<0.15 dep has a Python-2-only setup.py and fails to build).
+# chatterbox-tts itself is installed with --no-deps in install.sh.
+# These are its real runtime deps, mirroring upstream's pyproject.toml
+# minus russian-text-stresser (whose ancient pins break the resolver).
 omegaconf==2.3.0
-# https://github.com/mudler/LocalAI/pull/6240#issuecomment-3329518289
-chatterbox-tts@git+https://git@github.com/mudler/chatterbox.git@faster
+resampy==0.4.3
+librosa
+s3tokenizer
+diffusers
+resemble-perth==1.0.1
+conformer
+safetensors
+spacy-pkuseg
+pykakasi==2.3.0
 accelerate
 oneccl_bind_pt==2.3.100+xpu
 optimum[openvino]
diff --git a/backend/python/chatterbox/requirements-l4t12.txt b/backend/python/chatterbox/requirements-l4t12.txt
index c213ad908..009934b5b 100644
--- a/backend/python/chatterbox/requirements-l4t12.txt
+++ b/backend/python/chatterbox/requirements-l4t12.txt
@@ -3,8 +3,17 @@ torch
 torchaudio
 transformers
 numpy>=1.24.0,<1.26.0
-# Pin omegaconf so pip doesn't backtrack into 1.x sdists (whose
-# ruamel.yaml<0.15 dep has a Python-2-only setup.py and fails to build).
+# chatterbox-tts itself is installed with --no-deps in install.sh.
+# These are its real runtime deps, mirroring upstream's pyproject.toml
+# minus russian-text-stresser (whose ancient pins break the resolver).
 omegaconf==2.3.0
-chatterbox-tts@git+https://git@github.com/mudler/chatterbox.git@faster
+resampy==0.4.3
+librosa
+s3tokenizer
+diffusers
+resemble-perth==1.0.1
+conformer
+safetensors
+spacy-pkuseg
+pykakasi==2.3.0
 accelerate
diff --git a/backend/python/chatterbox/requirements-l4t13.txt b/backend/python/chatterbox/requirements-l4t13.txt
index f1f856280..bd7b80c6e 100644
--- a/backend/python/chatterbox/requirements-l4t13.txt
+++ b/backend/python/chatterbox/requirements-l4t13.txt
@@ -3,8 +3,17 @@ torch
 torchaudio
 transformers
 numpy>=1.24.0,<1.26.0
-# Pin omegaconf so pip doesn't backtrack into 1.x sdists (whose
-# ruamel.yaml<0.15 dep has a Python-2-only setup.py and fails to build).
+# chatterbox-tts itself is installed with --no-deps in install.sh.
+# These are its real runtime deps, mirroring upstream's pyproject.toml
+# minus russian-text-stresser (whose ancient pins break the resolver).
 omegaconf==2.3.0
-chatterbox-tts@git+https://git@github.com/mudler/chatterbox.git@faster
+resampy==0.4.3
+librosa
+s3tokenizer
+diffusers
+resemble-perth==1.0.1
+conformer
+safetensors
+spacy-pkuseg
+pykakasi==2.3.0
 accelerate
diff --git a/backend/python/chatterbox/requirements-mps.txt b/backend/python/chatterbox/requirements-mps.txt
index 86d2b5d8f..6aaa122c7 100644
--- a/backend/python/chatterbox/requirements-mps.txt
+++ b/backend/python/chatterbox/requirements-mps.txt
@@ -3,8 +3,16 @@ torchaudio
 accelerate
 numpy>=1.24.0,<1.26.0
 transformers
-# Pin omegaconf so pip doesn't backtrack into 1.x sdists (whose
-# ruamel.yaml<0.15 dep has a Python-2-only setup.py and fails to build).
+# chatterbox-tts itself is installed with --no-deps in install.sh.
+# These are its real runtime deps, mirroring upstream's pyproject.toml
+# minus russian-text-stresser (whose ancient pins break the resolver).
 omegaconf==2.3.0
-# https://github.com/mudler/LocalAI/pull/6240#issuecomment-3329518289
-chatterbox-tts@git+https://git@github.com/mudler/chatterbox.git@faster
\ No newline at end of file
+resampy==0.4.3
+librosa
+s3tokenizer
+diffusers
+resemble-perth==1.0.1
+conformer
+safetensors
+spacy-pkuseg
+pykakasi==2.3.0
\ No newline at end of file