diff --git a/shell/tsu.sh b/shell/tsu.sh
index 8b349a9..57fa6f5 100755
--- a/shell/tsu.sh
+++ b/shell/tsu.sh
@@ -279,10 +279,10 @@ unset LD_PRELOAD
 
 ## Build the environment
 [[ -z "$_TSU_DEBUG" ]] || set +x
-ENV_BUILT=""
+ENV_BUILT=()
 
 for key in "${!EXP_ENV[@]}"; do
-	ENV_BUILT="$ENV_BUILT $key=${EXP_ENV[$key]} "
+	ENV_BUILT+=("$key=${EXP_ENV[$key]}")
 done
 [[ -z "$_TSU_DEBUG" ]] || set -x
 
@@ -315,12 +315,13 @@ else
 			# Let's use the system toybox/toolbox for now
 			if [[ -n "$ENVIRONMENT_PRESERVE" ]]; then
 				su_args+=("--preserve-environment")
-				su_cmdline="PATH=$ANDROID_SYSPATHS:$PATH $ENV_BUILT $STARTUP_SCRIPT "
+				path_for_system_env="PATH=$ANDROID_SYSPATHS:$PATH"
 			else
-				su_cmdline="PATH=$ANDROID_SYSPATHS env -i $ENV_BUILT $STARTUP_SCRIPT"
+				path_for_system_env="PATH=$ANDROID_SYSPATHS"
+				env_cmd="-i"
 			fi
-			su_args+=("-c")
-			exec "${su_args[@]}" "${su_cmdline}"
+			su_args+=("-ps")
+			exec env "$path_for_system_env" env "$env_cmd" "${ENV_BUILT[@]}" "${su_args[@]}" "$STARTUP_SCRIPT"
 		fi
 	done
 fi