diff --git a/packages/grpc-js/gulpfile.js b/packages/grpc-js/gulpfile.js
index 14774729..9f30ae10 100644
--- a/packages/grpc-js/gulpfile.js
+++ b/packages/grpc-js/gulpfile.js
@@ -28,8 +28,8 @@ const del = require('del');
 const jsDir = __dirname;
 
 gulp.task('js.clean.links', 'Delete npm links', () => {
-  del(path.resolve(jsDir, 'node_modules/@grpc/js-core'));
-  del(path.resolve(jsDir, 'node_modules/@grpc/surface'));
+  return del([path.resolve(jsDir, 'node_modules/@grpc/js-core'),
+              path.resolve(jsDir, 'node_modules/@grpc/surface')]);
 });
 
 gulp.task('js.clean.all', 'Delete all files created by tasks',
diff --git a/packages/grpc-native/gulpfile.js b/packages/grpc-native/gulpfile.js
index c770a78f..dcbea445 100644
--- a/packages/grpc-native/gulpfile.js
+++ b/packages/grpc-native/gulpfile.js
@@ -28,8 +28,8 @@ const del = require('del');
 const nativeDir = __dirname;
 
 gulp.task('native.clean.links', 'Delete npm links', () => {
-  del(path.resolve(nativeDir, 'node_modules/@grpc/native-core'));
-  del(path.resolve(nativeDir, 'node_modules/@grpc/surface'));
+  return del([path.resolve(nativeDir, 'node_modules/@grpc/native-core'),
+              path.resolve(nativeDir, 'node_modules/@grpc/surface')]);
 });
 
 gulp.task('native.clean.all', 'Delete all files created by tasks',