Use --extra-index-url for vLLM installation

Author: mc-nv

build.py

@@ -1494,7 +1494,7 @@ def dockerfile_prepare_container_linux(argmap, backends, enable_gpu, target_mach
             cp -r nvpl_slim_24.04/include/* /usr/local/include && \\
             rm -rf nvpl_slim_24.04.tar nvpl_slim_24.04; \\
         fi \\
-        && pip3 install --no-cache-dir --progress-bar on --index-url $VLLM_INDEX_URL -r /run/secrets/requirements \\
+        && pip3 install --no-cache-dir --extra-index-url $VLLM_INDEX_URL -r /run/secrets/requirements \\
         # Need to install in-house build of pytorch-triton to support triton_key definition used by torch 2.5.1
         && cd /tmp \\
         && wget $PYTORCH_TRITON_URL \\