diff --git a/backends/arm/scripts/build_executorch_runner.sh b/backends/arm/scripts/build_executorch_runner.sh
index 3c2dafcc42b..807821d427f 100755
--- a/backends/arm/scripts/build_executorch_runner.sh
+++ b/backends/arm/scripts/build_executorch_runner.sh
@@ -150,7 +150,7 @@ cmake \
 
 echo "[${BASH_SOURCE[0]}] Configured CMAKE"
 
-cmake --build ${output_folder}/cmake-out --parallel -- arm_executor_runner
+cmake --build ${output_folder}/cmake-out -j$(nproc) -- arm_executor_runner
 
 echo "[${BASH_SOURCE[0]}] Generated baremetal elf file:"
 find ${output_folder}/cmake-out -name "arm_executor_runner"
diff --git a/backends/arm/test/setup_testing.sh b/backends/arm/test/setup_testing.sh
index b9f8fc454ee..ea5e6a4f603 100755
--- a/backends/arm/test/setup_testing.sh
+++ b/backends/arm/test/setup_testing.sh
@@ -47,7 +47,7 @@ function build_semihosting_executorch_runner() {
     echo "[${FUNCNAME[0]}] Configured CMAKE"
 
     n=$(nproc)
-    cmake --build ${build_test_dir} -- -j"$((n - 5))" arm_executor_runner
+    cmake --build ${build_test_dir} -j"$((n - 5))" -- arm_executor_runner
     echo "[${FUNCNAME[0]}] Generated baremetal elf file: with semihosting enabled"
     find ${build_test_dir} -name "arm_executor_runner"
 }