From dcc63dc5452c212d5a9e9944a37ade5ff4a3b315 Mon Sep 17 00:00:00 2001
From: Alison Shao <54658187+alisonshao@users.noreply.github.com>
Date: Wed, 11 Feb 2026 08:05:29 -0800
Subject: [PATCH] [CI] Guard python3 call in install script for fresh runners
 (#18609)

---
 scripts/ci/cuda/ci_install_dependency.sh | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/scripts/ci/cuda/ci_install_dependency.sh b/scripts/ci/cuda/ci_install_dependency.sh
index 42b48169c..97b3ef310 100755
--- a/scripts/ci/cuda/ci_install_dependency.sh
+++ b/scripts/ci/cuda/ci_install_dependency.sh
@@ -23,16 +23,13 @@ SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 bash "${SCRIPT_DIR}/../../killall_sglang.sh"
 echo "CUDA_VISIBLE_DEVICES=${CUDA_VISIBLE_DEVICES:-}"
 
-# Clear torch compilation cache
-python3 -c 'import os, shutil, tempfile, getpass; cache_dir = os.environ.get("TORCHINDUCTOR_CACHE_DIR") or os.path.join(tempfile.gettempdir(), "torchinductor_" + getpass.getuser()); shutil.rmtree(cache_dir, ignore_errors=True)'
-
-# Install apt packages
+# Install apt packages (including python3/pip which may be missing on some runners)
 # Use --no-install-recommends and ignore errors from unrelated broken packages on the runner
 # The NVIDIA driver packages may have broken dependencies that are unrelated to these packages
-apt-get install -y --no-install-recommends git libnuma-dev libssl-dev pkg-config libibverbs-dev libibverbs1 ibverbs-providers ibverbs-utils || {
+apt-get install -y --no-install-recommends python3 python3-pip python3-venv git libnuma-dev libssl-dev pkg-config libibverbs-dev libibverbs1 ibverbs-providers ibverbs-utils || {
     echo "Warning: apt-get install failed, checking if required packages are available..."
     # Verify the packages we need are actually installed
-    for pkg in git libnuma-dev libssl-dev pkg-config libibverbs-dev libibverbs1 ibverbs-providers ibverbs-utils; do
+    for pkg in python3 python3-pip python3-venv git libnuma-dev libssl-dev pkg-config libibverbs-dev libibverbs1 ibverbs-providers ibverbs-utils; do
         if ! dpkg -l "$pkg" 2>/dev/null | grep -q "^ii"; then
             echo "ERROR: Required package $pkg is not installed and apt-get failed"
             exit 1
@@ -41,6 +38,9 @@ apt-get install -y --no-install-recommends git libnuma-dev libssl-dev pkg-config
     echo "All required packages are already installed, continuing..."
 }
 
+# Clear torch compilation cache
+python3 -c 'import os, shutil, tempfile, getpass; cache_dir = os.environ.get("TORCHINDUCTOR_CACHE_DIR") or os.path.join(tempfile.gettempdir(), "torchinductor_" + getpass.getuser()); shutil.rmtree(cache_dir, ignore_errors=True)'
+
 # Check if protoc of correct architecture is already installed
 if command -v protoc >/dev/null 2>&1; then
     if protoc --version >/dev/null 2>&1; then
@@ -93,8 +93,8 @@ else
     echo "protoc already installed: $(protoc --version)"
 fi
 
-# Install uv
-pip install --upgrade pip
+# Install uv (use python3 -m pip for robustness since some runners only have pip3)
+python3 -m pip install --upgrade pip
 
 if [ "$IS_BLACKWELL" = "1" ]; then
     # The blackwell CI runner has some issues with pip and uv,