diff --git a/packages/plugin-legacy/src/index.ts b/packages/plugin-legacy/src/index.ts
index bc21d4d917d8df..ff6f30685e199a 100644
--- a/packages/plugin-legacy/src/index.ts
+++ b/packages/plugin-legacy/src/index.ts
@@ -47,6 +47,8 @@ const forceDynamicImportUsage = `export function __vite_legacy_guard(){import('d
 
 const legacyEnvVarMarker = `__VITE_IS_LEGACY__`
 
+const _require = createRequire(import.meta.url)
+
 function viteLegacyPlugin(options: Options = {}): Plugin[] {
   let config: ResolvedConfig
   const targets = options.targets || 'defaults'
@@ -175,7 +177,6 @@ function viteLegacyPlugin(options: Options = {}): Plugin[] {
     }
   }
 
-  const _require = createRequire(import.meta.url)
   const legacyPostPlugin: Plugin = {
     name: 'vite:legacy-post-process',
     enforce: 'post',
@@ -328,21 +329,10 @@ function viteLegacyPlugin(options: Options = {}): Plugin[] {
           ],
           [
             'env',
-            {
-              targets,
-              modules: false,
-              bugfixes: true,
-              loose: false,
-              useBuiltIns: needPolyfills ? 'usage' : false,
-              corejs: needPolyfills
-                ? {
-                    version: _require('core-js/package.json').version,
-                    proposals: false
-                  }
-                : undefined,
-              shippedProposals: true,
+            createBabelPresetEnvOptions(targets, {
+              needPolyfills,
               ignoreBrowserslistConfig: options.ignoreBrowserslistConfig
-            }
+            })
           ]
         ]
       })
@@ -528,14 +518,7 @@ export async function detectPolyfills(
     presets: [
       [
         'env',
-        {
-          targets,
-          modules: false,
-          useBuiltIns: 'usage',
-          corejs: { version: 3, proposals: false },
-          shippedProposals: true,
-          ignoreBrowserslistConfig: true
-        }
+        createBabelPresetEnvOptions(targets, { ignoreBrowserslistConfig: true })
       ]
     ]
   })
@@ -552,6 +535,30 @@ export async function detectPolyfills(
   }
 }
 
+function createBabelPresetEnvOptions(
+  targets: any,
+  {
+    needPolyfills = true,
+    ignoreBrowserslistConfig
+  }: { needPolyfills?: boolean; ignoreBrowserslistConfig?: boolean }
+) {
+  return {
+    targets,
+    bugfixes: true,
+    loose: false,
+    modules: false,
+    useBuiltIns: needPolyfills ? 'usage' : false,
+    corejs: needPolyfills
+      ? {
+          version: _require('core-js/package.json').version,
+          proposals: false
+        }
+      : undefined,
+    shippedProposals: true,
+    ignoreBrowserslistConfig
+  }
+}
+
 async function buildPolyfillChunk(
   imports: Set<string>,
   bundle: OutputBundle,
diff --git a/playground/legacy/__tests__/legacy.spec.ts b/playground/legacy/__tests__/legacy.spec.ts
index cbf44112b122c1..f68371b1df7438 100644
--- a/playground/legacy/__tests__/legacy.spec.ts
+++ b/playground/legacy/__tests__/legacy.spec.ts
@@ -104,5 +104,6 @@ describe.runIf(isBuild)('build', () => {
 
   test('includes structuredClone polyfill which is supported after core-js v3', () => {
     expect(findAssetFile(/polyfills-legacy/)).toMatch('"structuredClone"')
+    expect(findAssetFile(/polyfills\./)).toMatch('"structuredClone"')
   })
 })