Fix unbound variable.

Author: ScottTodd

.github/workflows/pkgci_build_packages.yml

@@ -47,6 +47,7 @@ jobs:
     - name: Build shortfin
       env:
         OVERRIDE_PYTHON_VERSIONS: cp311-cp311
+        SHORTFIN_ENABLE_TRACING: "OFF"
       run: |
         ./shortfin/build_tools/build_linux_package.sh
     - name: Build shark-ai

shortfin/build_tools/build_linux_package.sh

@@ -44,6 +44,7 @@ ARCH="$(uname -m)"
 MANYLINUX_DOCKER_IMAGE="${MANYLINUX_DOCKER_IMAGE:-quay.io/pypa/manylinux2014_${ARCH}:latest}"
 PYTHON_VERSIONS="${OVERRIDE_PYTHON_VERSIONS:-cp311-cp311 cp312-cp312 cp313-cp313}"
 OUTPUT_DIR="${OUTPUT_DIR:-${THIS_DIR}/wheelhouse}"
+SHORTFIN_ENABLE_TRACING="${SHORTFIN_ENABLE_TRACING:ON}"
 
 function run_on_host() {
   echo "Running on host"