Update Dockerfile

Dockerfile

@@ -11,13 +11,15 @@ RUN apt-get update && apt-get install -y \
     g++ \
     && rm -rf /var/lib/apt/lists/*
 
-# CRITICAL: setuptools>=81 removed pkg_resources.
-# Pin to <81 so legacy setup.py packages (openai-whisper, python-pesq) can build.
+# Pin setuptools<81 (pkg_resources was removed in setuptools>=81).
+# --no-build-isolation makes pip skip creating an isolated subprocess env,
+# so it uses OUR pinned setuptools instead of downloading the latest one.
 RUN pip install --no-cache-dir "setuptools<81" wheel cython
 
-# Install legacy packages that use old-style setup.py with pkg_resources
-RUN pip install --no-cache-dir openai-whisper==20231117
-RUN pip install --no-cache-dir https://github.com/ludlows/python-pesq/archive/master.zip
+# Install legacy packages with --no-build-isolation so pip reuses the
+# pinned setuptools above instead of pulling setuptools>=81 into a temp env.
+RUN pip install --no-cache-dir --no-build-isolation openai-whisper==20231117
+RUN pip install --no-cache-dir --no-build-isolation https://github.com/ludlows/python-pesq/archive/master.zip
 
 # Copy and install remaining requirements
 COPY requirements.txt .