diff --git a/src/plugins/esmShim.ts b/src/plugins/esmShim.ts
index 4bf4f1f..3546599 100644
--- a/src/plugins/esmShim.ts
+++ b/src/plugins/esmShim.ts
@@ -1,9 +1,3 @@
-/*
- * The core of this plugin was conceived by pi0 and is taken from the following repository:
- * https://github.com/unjs/unbuild/blob/main/src/builder/plugins/cjs.ts
- * license: https://github.com/unjs/unbuild/blob/main/LICENSE
- */
-
 import MagicString from 'magic-string'
 import type { Plugin } from 'vite'
 
@@ -13,37 +7,22 @@ const CJSyntaxRe = /__filename|__dirname|require\(|require\.resolve\(/
 
 const CJSShim_normal = `
 // -- CommonJS Shims --
-import __cjs_url__ from 'node:url';
-import __cjs_path__ from 'node:path';
-import __cjs_mod__ from 'node:module';
-const __filename = __cjs_url__.fileURLToPath(import.meta.url);
-const __dirname = __cjs_path__.dirname(__filename);
-const require = __cjs_mod__.createRequire(import.meta.url);
+import __shims_url__ from 'node:url';
+import __shims_path__ from 'node:path';
+import __shims_module__ from 'node:module';
+const __filename = __shims_url__.fileURLToPath(import.meta.url);
+const __dirname = __shims_path__.dirname(__filename);
+const require = __shims_module__.createRequire(import.meta.url);
 `
 
 const CJSShim_node_20_11 = `
 // -- CommonJS Shims --
-import __cjs_mod__ from 'node:module';
+import __shims_module__ from 'node:module';
 const __filename = import.meta.filename;
 const __dirname = import.meta.dirname;
-const require = __cjs_mod__.createRequire(import.meta.url);
+const require = __shims_module__.createRequire(import.meta.url);
 `
 
-const ESMStaticImportRe =
-  /(?<=\s|^|;)import\s*([\s"']*(?<imports>[\p{L}\p{M}\w\t\n\r $*,/{}@.]+)from\s*)?["']\s*(?<specifier>(?<="\s*)[^"]*[^\s"](?=\s*")|(?<='\s*)[^']*[^\s'](?=\s*'))\s*["'][\s;]*/gmu
-
-interface StaticImport {
-  end: number
-}
-
-function findStaticImports(code: string): StaticImport[] {
-  const matches: StaticImport[] = []
-  for (const match of code.matchAll(ESMStaticImportRe)) {
-    matches.push({ end: (match.index || 0) + match[0].length })
-  }
-  return matches
-}
-
 export default function esmShimPlugin(): Plugin {
   const CJSShim = supportImportMetaPaths() ? CJSShim_node_20_11 : CJSShim_normal
 
@@ -53,11 +32,14 @@ export default function esmShimPlugin(): Plugin {
     enforce: 'post',
     renderChunk(code, _chunk, { format, sourcemap }) {
       if (format === 'es') {
+        // Rolldown may remove unused shim bindings after this hook; referenced bindings remain available.
         if (code.includes(CJSShim) || !CJSyntaxRe.test(code)) {
           return null
         }
 
-        const lastESMImport = findStaticImports(code).pop()
+        const lastESMImport = this.parse(code)
+          .body.filter(node => node.type === 'ImportDeclaration')
+          .pop()
         const indexToAppend = lastESMImport ? lastESMImport.end : 0
         const s = new MagicString(code)
         s.appendRight(indexToAppend, CJSShim)