chore(uv): add --index-strategy=unsafe-first-match to l4t

This is because the main index might not contain all the dependencies
for torch

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

backend/python/chatterbox/install.sh

@@ -15,6 +15,14 @@ fi
 if [ "x${BUILD_PROFILE}" == "xintel" ]; then
     EXTRA_PIP_INSTALL_FLAGS+=" --upgrade --index-strategy=unsafe-first-match"
 fi
+
+# This is here because the jetson-ai-lab.io PyPI mirror's root PyPI endpoint (pypi.jetson-ai-lab.io/root/pypi/)
+# returns 503 errors when uv tries to fall back to it for packages not found in the specific subdirectory.
+# We need uv to continue falling through to the official PyPI index when it encounters these errors.
+if [ "x${BUILD_PROFILE}" == "xl4t12" ] || [ "x${BUILD_PROFILE}" == "xl4t13" ]; then
+    EXTRA_PIP_INSTALL_FLAGS+=" --index-strategy=unsafe-first-match"
+fi
+
 EXTRA_PIP_INSTALL_FLAGS+=" --no-build-isolation"
 
 installRequirements

backend/python/diffusers/install.sh

@@ -23,4 +23,11 @@ if [ "x${BUILD_PROFILE}" == "xl4t13" ]; then
   PY_STANDALONE_TAG="20251120"
 fi
 
+# This is here because the jetson-ai-lab.io PyPI mirror's root PyPI endpoint (pypi.jetson-ai-lab.io/root/pypi/)
+# returns 503 errors when uv tries to fall back to it for packages not found in the specific subdirectory.
+# We need uv to continue falling through to the official PyPI index when it encounters these errors.
+if [ "x${BUILD_PROFILE}" == "xl4t12" ] || [ "x${BUILD_PROFILE}" == "xl4t13" ]; then
+    EXTRA_PIP_INSTALL_FLAGS+=" --index-strategy=unsafe-first-match"
+fi
+
 installRequirements

backend/python/kokoro/install.sh

@@ -16,4 +16,11 @@ if [ "x${BUILD_PROFILE}" == "xintel" ]; then
     EXTRA_PIP_INSTALL_FLAGS+=" --upgrade --index-strategy=unsafe-first-match"
 fi
 
+# This is here because the jetson-ai-lab.io PyPI mirror's root PyPI endpoint (pypi.jetson-ai-lab.io/root/pypi/)
+# returns 503 errors when uv tries to fall back to it for packages not found in the specific subdirectory.
+# We need uv to continue falling through to the official PyPI index when it encounters these errors.
+if [ "x${BUILD_PROFILE}" == "xl4t12" ] || [ "x${BUILD_PROFILE}" == "xl4t13" ]; then
+    EXTRA_PIP_INSTALL_FLAGS+=" --index-strategy=unsafe-first-match"
+fi
+
 installRequirements

backend/python/neutts/install.sh

@@ -16,6 +16,13 @@ if [ "x${BUILD_PROFILE}" == "xintel" ]; then
     EXTRA_PIP_INSTALL_FLAGS+=" --upgrade --index-strategy=unsafe-first-match"
 fi
 
+# This is here because the jetson-ai-lab.io PyPI mirror's root PyPI endpoint (pypi.jetson-ai-lab.io/root/pypi/)
+# returns 503 errors when uv tries to fall back to it for packages not found in the specific subdirectory.
+# We need uv to continue falling through to the official PyPI index when it encounters these errors.
+if [ "x${BUILD_PROFILE}" == "xl4t12" ] || [ "x${BUILD_PROFILE}" == "xl4t13" ]; then
+    EXTRA_PIP_INSTALL_FLAGS+=" --index-strategy=unsafe-first-match"
+fi
+
 if [ "x${BUILD_TYPE}" == "xcublas" ] || [ "x${BUILD_TYPE}" == "xl4t" ]; then
     export CMAKE_ARGS="-DGGML_CUDA=on"
 fi

backend/python/vibevoice/install.sh

@@ -23,6 +23,13 @@ if [ "x${BUILD_PROFILE}" == "xl4t13" ]; then
   PY_STANDALONE_TAG="20251120"
 fi
 
+# This is here because the jetson-ai-lab.io PyPI mirror's root PyPI endpoint (pypi.jetson-ai-lab.io/root/pypi/)
+# returns 503 errors when uv tries to fall back to it for packages not found in the specific subdirectory.
+# We need uv to continue falling through to the official PyPI index when it encounters these errors.
+if [ "x${BUILD_PROFILE}" == "xl4t12" ] || [ "x${BUILD_PROFILE}" == "xl4t13" ]; then
+    EXTRA_PIP_INSTALL_FLAGS+=" --index-strategy=unsafe-first-match"
+fi
+
 installRequirements
 
 git clone https://github.com/microsoft/VibeVoice.git