diff --git a/packages/scoped-custom-element-registry/closure-flags.txt b/packages/scoped-custom-element-registry/closure-flags.txt
new file mode 100644
index 000000000..2bb774eda
--- /dev/null
+++ b/packages/scoped-custom-element-registry/closure-flags.txt
@@ -0,0 +1,17 @@
+--compilation_level=ADVANCED_OPTIMIZATIONS
+--warning_level=VERBOSE
+--language_in=STABLE
+--language_out=ECMASCRIPT5_STRICT
+--dependency_mode=PRUNE
+--entry_point=./src/scoped-custom-element-registry.js
+--js=./src/scoped-custom-element-registry.js
+--js_output_file=./scoped-custom-element-registry.min.js
+--output_wrapper="(function(){
+%output%
+}).call(typeof globalThis === 'object' ? globalThis : window);
+
+//# sourceMappingURL=scoped-custom-element-registry.min.js.map"
+--assume_function_wrapper=true
+--rewrite_polyfills=false
+--create_source_map=./scoped-custom-element-registry.min.js.map
+--source_map_include_content
diff --git a/packages/scoped-custom-element-registry/gulpfile.js b/packages/scoped-custom-element-registry/gulpfile.js
deleted file mode 100644
index 8f1361b5d..000000000
--- a/packages/scoped-custom-element-registry/gulpfile.js
+++ /dev/null
@@ -1,41 +0,0 @@
-/**
- * @license
- * Copyright (c) 2021 The Polymer Project Authors. All rights reserved.
- * This code may only be used under the BSD style license found at
- * http://polymer.github.io/LICENSE.txt The complete set of authors may be found
- * at http://polymer.github.io/AUTHORS.txt The complete set of contributors may
- * be found at http://polymer.github.io/CONTRIBUTORS.txt Code distributed by
- * Google as part of the polymer project is also subject to an additional IP
- * rights grant found at http://polymer.github.io/PATENTS.txt
- */
-
-'use strict';
-
-const compilerPackage = require('google-closure-compiler');
-const gulp = require('gulp');
-const sourcemaps = require('gulp-sourcemaps');
-
-const closureCompiler = compilerPackage.gulp();
-
-gulp.task('default', () => {
-  return gulp
-    .src('./src/**/*.js', {base: './'})
-    .pipe(sourcemaps.init())
-    .pipe(
-      closureCompiler({
-        compilation_level: 'ADVANCED',
-        warning_level: 'VERBOSE',
-        language_in: 'STABLE',
-        language_out: 'ECMASCRIPT5_STRICT',
-        dependency_mode: 'PRUNE',
-        entry_point: ['/src/scoped-custom-element-registry.js'],
-        js_output_file: 'scoped-custom-element-registry.min.js',
-        output_wrapper:
-          "(function(){\n%output%\n}).call(typeof globalThis === 'object' ? globalThis : window);",
-        assume_function_wrapper: true,
-        rewrite_polyfills: false,
-      })
-    )
-    .pipe(sourcemaps.write('/'))
-    .pipe(gulp.dest('./'));
-});
diff --git a/packages/scoped-custom-element-registry/package.json b/packages/scoped-custom-element-registry/package.json
index 72710d5ac..491826f07 100644
--- a/packages/scoped-custom-element-registry/package.json
+++ b/packages/scoped-custom-element-registry/package.json
@@ -47,9 +47,14 @@
   },
   "wireit": {
     "build": {
-      "command": "gulp",
+      "dependencies": [
+        "build:closure"
+      ]
+    },
+    "build:closure": {
+      "command": "google-closure-compiler --flagfile closure-flags.txt",
       "files": [
-        "gulpfile.js",
+        "closure-flags.txt",
         "src/**/*.js"
       ],
       "output": [