diff --git a/final-migration/run_final_migration.sh b/final-migration/run_final_migration.sh
index e7a1e01b4..41601e77e 100755
--- a/final-migration/run_final_migration.sh
+++ b/final-migration/run_final_migration.sh
@@ -16,6 +16,6 @@ done
 
 # Run inside Docker: perform clean build directory, configure with Qt6, build and run ctest
 ./app/run_docker.sh ../sandbox -- bash -lc \
-  "set -euo pipefail && export LD_LIBRARY_PATH=/opt/Qt/6.8.3/gcc_64/lib:\$LD_LIBRARY_PATH && export QT_QPA_PLATFORM=offscreen && rm -rf /repo/build && cmake -S /repo -B /repo/build -G Ninja -DCMAKE_PREFIX_PATH=/opt/Qt/6.8.3/gcc_64 -DBUILD_WS=ON -DBUILD_TESTING=ON && cmake --build /repo/build -- -j${JOBS} && ctest --test-dir /repo/build --output-on-failure"
+  "set -euo pipefail && export LD_LIBRARY_PATH=/opt/Qt/6.8.3/gcc_64/lib:${LD_LIBRARY_PATH:-} && export QT_QPA_PLATFORM=offscreen && rm -rf /repo/build && cmake -S /repo -B /repo/build -G Ninja -DCMAKE_PREFIX_PATH=/opt/Qt/6.8.3/gcc_64 -DBUILD_WS=ON -DBUILD_TESTING=ON && cmake --build /repo/build -- -j${JOBS} && ctest --test-dir /repo/build --output-on-failure"
 
 echo "Final migration build + tests complete. See ./build for artifacts and test logs in ./build/Testing/Temporary."
\ No newline at end of file