diff --git a/barretenberg/acir_tests/reset_acir_tests.sh b/barretenberg/acir_tests/reset_acir_tests.sh
index e83bea9189e..dffb4d43837 100755
--- a/barretenberg/acir_tests/reset_acir_tests.sh
+++ b/barretenberg/acir_tests/reset_acir_tests.sh
@@ -1,7 +1,8 @@
-cd ~/aztec-packages/noir/noir-repo
+# Run from barretenberg/acir_tests
+cd ../../noir/noir-repo
 cargo clean
 noirup -p .
 cd test_programs && ./rebuild.sh
 
-cd ~/aztec-packages/barretenberg/acir_tests
+cd ../../../barretenberg/acir_tests
 rm -rf acir_tests
diff --git a/noir/noir-repo/test_programs/rebuild.sh b/noir/noir-repo/test_programs/rebuild.sh
index 094c3902583..a8175d05066 100755
--- a/noir/noir-repo/test_programs/rebuild.sh
+++ b/noir/noir-repo/test_programs/rebuild.sh
@@ -1,6 +1,8 @@
 #!/usr/bin/env bash
 set -e
 
+NO_PARALLEL=${1:-}
+
 process_dir() {
     local dir=$1
     local current_dir=$2
@@ -60,7 +62,46 @@ for dir in $current_dir/benchmarks/*; do
     dirs_to_process+=("$dir")
 done
 
+pids=() # Array to hold PIDs of background processes
+dirs_map=() # Array to map PIDs to directories
+
+if [ -z $NO_PARALLEL ]; then
+    # Process directories in parallel
+    for dir in "${dirs_to_process[@]}"; do
+        process_dir "$dir" "$current_dir" &  # Run process_dir in the background
+        pid=$!  # Get PID of the last background command
+        pids+=($pid)  # Add PID to the pids array
+        dirs_map[$pid]=$dir  # Map PID to the directory being processed
+    done
+else
+    # Process directories sequentially
+    for dir in "${dirs_to_process[@]}"; do
+        process_dir "$dir" "$current_dir"  # Run process_dir in the foreground
+        pid=$!  # Get PID of the last command
+        pids+=($pid)  # Add PID to the pids array
+        dirs_map[$pid]=$dir  # Map PID to the directory being processed
+    done
+fi
+
+# Store the failed processes
+failed_pids=()
+# Check the exit status of each background job.
+for pid in "${pids[@]}"; do
+    if ! wait $pid; then  # Wait for the process to complete, check if it failed
+        exit_status=$?  # Capture the failed exit status
+        failed_pids+=($pid)
+    fi
+done
 
-parallel -j0  process_dir {} "$current_dir" ::: ${dirs_to_process[@]}
-
-echo "Rebuild Succeeded!"
+echo ""
+
+# Exit with a failure status if any job failed.
+if [ ! -z "$exit_status" ]; then
+    echo "Rebuild failed for directories:"
+    # Print the failed directories after waiting for each process to complete
+    for pid in "${failed_pids[@]}"; do
+        echo "${dirs_map[$pid]}"
+    done
+    exit $exit_status
+fi
+echo "Rebuild Succeeded!"
\ No newline at end of file