diff --git a/leaderboard/scripts/run_evaluation.sh b/leaderboard/scripts/run_evaluation.sh
index d24574a..247b44c 100644
--- a/leaderboard/scripts/run_evaluation.sh
+++ b/leaderboard/scripts/run_evaluation.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 # Must set CARLA_ROOT
-export CARLA_ROOT=YOUR_CARLA_PATH
+export CARLA_ROOT=${CARLA_ROOT:-YOUR_CARLA_PATH}
 export CARLA_SERVER=${CARLA_ROOT}/CarlaUE4.sh
 export PYTHONPATH=$PYTHONPATH:${CARLA_ROOT}/PythonAPI
 export PYTHONPATH=$PYTHONPATH:${CARLA_ROOT}/PythonAPI/carla