diff --git a/packages/angular_devkit/benchmark/src/monitored-process.ts b/packages/angular_devkit/benchmark/src/monitored-process.ts
index 885736121e43..4a45fdff6a8c 100644
--- a/packages/angular_devkit/benchmark/src/monitored-process.ts
+++ b/packages/angular_devkit/benchmark/src/monitored-process.ts
@@ -37,7 +37,7 @@ export class LocalMonitoredProcess implements MonitoredProcess {
   run(): Observable<number> {
     return new Observable(obs => {
       const { cmd, cwd, args } = this.command;
-      const spawnOptions: SpawnOptions = { cwd: cwd, shell: true };
+      const spawnOptions: SpawnOptions = { cwd };
 
       // Spawn the process.
       const childProcess = spawn(cmd, args, spawnOptions);