diff --git a/build/fetch.js b/build/fetch.js
new file mode 100644
index 00000000000..a3ab88704f8
--- /dev/null
+++ b/build/fetch.js
@@ -0,0 +1,36 @@
+const esbuild = require('esbuild')
+const fs = require('fs')
+const path = require('path')
+
+// Copied from: https://github.com/evanw/esbuild/issues/859#issuecomment-829154955
+const nodeModules = /^(?:.*[\\/])?node_modules(?:[\\/].*)?$/
+
+const dirnamePlugin = {
+  name: 'dirname',
+  setup (build) {
+    build.onLoad({ filter: /.*/ }, ({ path: filePath }) => {
+      if (!filePath.match(nodeModules)) {
+        let contents = fs.readFileSync(filePath, 'utf8')
+        const loader = path.extname(filePath).substring(1)
+        const dirname = path.dirname(filePath)
+        contents = contents
+          .replace('__dirname', `"${dirname}"`)
+          .replace('__filename', `"${filePath}"`)
+        return {
+          contents,
+          loader
+        }
+      }
+    })
+  }
+}
+
+esbuild.build({
+  platform: 'node',
+  entryPoints: [path.resolve('index-fetch.js')],
+  bundle: true,
+  outfile: path.resolve('undici-fetch.js'),
+  plugins: [dirnamePlugin]
+}).then(() => {
+  console.log('Build complete.')
+})
diff --git a/package.json b/package.json
index a780bc10376..ab4c976aab4 100644
--- a/package.json
+++ b/package.json
@@ -70,7 +70,7 @@
     "docs"
   ],
   "scripts": {
-    "build:node": "npx esbuild@0.14.38 index-fetch.js --bundle --platform=node --outfile=undici-fetch.js",
+    "build:node": "node build/fetch.js",
     "prebuild:wasm": "node build/wasm.js --prebuild",
     "build:wasm": "node build/wasm.js --docker",
     "lint": "standard | snazzy",
@@ -109,6 +109,7 @@
     "delay": "^5.0.0",
     "dns-packet": "^5.4.0",
     "docsify-cli": "^4.4.3",
+    "esbuild": "^0.19.4",
     "form-data": "^4.0.0",
     "formdata-node": "^4.3.1",
     "https-pem": "^3.0.0",