diff --git a/README.md b/README.md
index 94d5de4..1f3478a 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ First, you'll need a `vercel.json` file in your project:
 {
   "functions": {
     "api/**/*.rs": {
-      "runtime": "vercel-rust@4.0.0-beta.1"
+      "runtime": "vercel-rust@4.0.0-beta.2"
     }
   }
 }
diff --git a/examples/cron/vercel.json b/examples/cron/vercel.json
index 1256a50..d114cc3 100644
--- a/examples/cron/vercel.json
+++ b/examples/cron/vercel.json
@@ -1,7 +1,7 @@
 {
   "functions": {
     "api/**/*.rs": {
-      "runtime": "vercel-rust@4.0.0-beta.1"
+      "runtime": "vercel-rust@4.0.0-beta.2"
     }
   },
   "crons": [
diff --git a/examples/nextjs/vercel.json b/examples/nextjs/vercel.json
index 88678ee..5ab2393 100644
--- a/examples/nextjs/vercel.json
+++ b/examples/nextjs/vercel.json
@@ -1,7 +1,7 @@
 {
   "functions": {
     "api/**/*.rs": {
-      "runtime": "vercel-rust@4.0.0-beta.1"
+      "runtime": "vercel-rust@4.0.0-beta.2"
     }
   }
 }
diff --git a/examples/simple/vercel.json b/examples/simple/vercel.json
index 88678ee..5ab2393 100644
--- a/examples/simple/vercel.json
+++ b/examples/simple/vercel.json
@@ -1,7 +1,7 @@
 {
   "functions": {
     "api/**/*.rs": {
-      "runtime": "vercel-rust@4.0.0-beta.1"
+      "runtime": "vercel-rust@4.0.0-beta.2"
     }
   }
 }
diff --git a/package.json b/package.json
index 7d20dc0..3d38ea5 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "vercel-rust",
-  "version": "4.0.0-beta.1",
+  "version": "4.0.0-beta.2",
   "description": "Rust runtime for Vercel Functions.",
   "homepage": "https://github.com/vercel-community/rust",
   "repository": {
diff --git a/src/index.ts b/src/index.ts
index 9ee3004..c219a25 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,4 +1,3 @@
-import fs from 'node:fs';
 import path from 'node:path';
 import type { BuildOptions, BuildResultV3 } from '@vercel/build-utils';
 import {
@@ -6,57 +5,25 @@ import {
   debug,
   download,
   glob,
-  runShellScript,
   createLambda,
 } from '@vercel/build-utils';
 import execa from 'execa';
 import { installRustToolchain } from './lib/rust-toolchain';
 import type { Runtime } from './lib/runtime';
-import { getCargoMetadata, findBinaryName, findCargoWorkspace } from './lib/cargo';
+import {
+  getCargoMetadata,
+  findBinaryName,
+  findCargoWorkspace,
+} from './lib/cargo';
+import {
+  assertEnv,
+  getExecutableName,
+  gatherExtraFiles,
+  runUserScripts,
+} from './lib/utils';
 
 type RustEnv = Record<'RUSTFLAGS' | 'PATH', string>;
 
-function assertEnv(name: string): string {
-  if (!process.env[name]) {
-    throw new Error(`Missing ENV variable process.env.${name}`);
-  }
-
-  return process.env[name] as unknown as string;
-}
-
-async function runUserScripts(dir: string): Promise<void> {
-  const buildScriptPath = path.join(dir, 'build.sh');
-  const buildScriptExists = fs.existsSync(buildScriptPath);
-
-  if (buildScriptExists) {
-    debug('Running `build.sh`');
-    await runShellScript(buildScriptPath);
-  }
-}
-
-async function gatherExtraFiles(
-  globMatcher: string | string[] | undefined,
-  workPath: string,
-): Promise<Record<string, FileFsRef>> {
-  if (!globMatcher) return {};
-
-  debug(
-    `Gathering extra files for glob \`${JSON.stringify(
-      globMatcher,
-    )}\` in ${workPath}`,
-  );
-
-  if (Array.isArray(globMatcher)) {
-    const allMatches = await Promise.all(
-      globMatcher.map((pattern) => glob(pattern, workPath)),
-    );
-
-    return allMatches.reduce((acc, matches) => ({ ...acc, ...matches }), {});
-  }
-
-  return glob(globMatcher, workPath);
-}
-
 async function buildHandler(options: BuildOptions): Promise<BuildResultV3> {
   const BUILDER_DEBUG = Boolean(process.env.VERCEL_BUILDER_DEBUG ?? false);
   const { files, entrypoint, workPath, config, meta } = options;
@@ -103,11 +70,7 @@ async function buildHandler(options: BuildOptions): Promise<BuildResultV3> {
     throw err;
   }
 
-  debug(`Building \`${binaryName}\` completed`);
-
-  // The compiled binary in Windows has the `.exe` extension
-  const binExtension = process.platform === 'win32' ? '.exe' : '';
-  const bootstrap = `bootstrap${binExtension}`;
+  debug(`Building \`${binaryName}\` for \`${process.platform}\` completed`);
 
   const { target_directory: targetDirectory } = await getCargoMetadata({
     cwd: process.cwd(),
@@ -117,9 +80,10 @@ async function buildHandler(options: BuildOptions): Promise<BuildResultV3> {
   const bin = path.join(
     targetDirectory,
     BUILDER_DEBUG ? 'debug' : 'release',
-    binaryName,
+    getExecutableName(binaryName),
   );
 
+  const bootstrap = getExecutableName('bootstrap');
   const lambda = await createLambda({
     files: {
       ...extraFiles,
@@ -141,7 +105,6 @@ const runtime: Runtime = {
   prepareCache: async ({ workPath }) => {
     debug(`Caching \`${workPath}\``);
     const cacheFiles = await glob('target/**', workPath);
-
     // Convert this into a reduce
     for (const f of Object.keys(cacheFiles)) {
       const accept =
@@ -155,7 +118,6 @@ const runtime: Runtime = {
         delete cacheFiles[f];
       }
     }
-
     return cacheFiles;
   },
   shouldServe: async (options): Promise<boolean> => {
diff --git a/src/lib/rust-toolchain.ts b/src/lib/rust-toolchain.ts
index 25b4a1e..42722fa 100644
--- a/src/lib/rust-toolchain.ts
+++ b/src/lib/rust-toolchain.ts
@@ -5,7 +5,7 @@ async function downloadRustToolchain({
   version = 'stable',
 }: {
   version?: string;
-}) {
+}): Promise<void> {
   try {
     await execa(
       `curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain ${version}`,
@@ -21,7 +21,7 @@ async function downloadRustToolchain({
   }
 }
 
-export const installRustToolchain = async (version?: string) => {
+export const installRustToolchain = async (version?: string): Promise<void> => {
   try {
     await execa(`rustup -V`, [], { shell: true, stdio: 'ignore' });
     debug('Rust Toolchain is already installed, skipping download');
diff --git a/src/lib/utils.ts b/src/lib/utils.ts
new file mode 100644
index 0000000..123c33a
--- /dev/null
+++ b/src/lib/utils.ts
@@ -0,0 +1,49 @@
+import fs from 'node:fs';
+import path from 'node:path';
+import type { FileFsRef } from '@vercel/build-utils';
+import { debug, glob, runShellScript } from '@vercel/build-utils';
+
+export function getExecutableName(binName: string): string {
+  // The compiled binary in Windows has the `.exe` extension
+  return process.platform === 'win32' ? `${binName}.exe` : binName;
+}
+
+export function assertEnv(name: string): string {
+  if (!process.env[name]) {
+    throw new Error(`Missing ENV variable process.env.${name}`);
+  }
+  return process.env[name] as unknown as string;
+}
+
+export async function runUserScripts(dir: string): Promise<void> {
+  const buildScriptPath = path.join(dir, 'build.sh');
+  const buildScriptExists = fs.existsSync(buildScriptPath);
+
+  if (buildScriptExists) {
+    debug('Running `build.sh`');
+    await runShellScript(buildScriptPath);
+  }
+}
+
+export async function gatherExtraFiles(
+  globMatcher: string | string[] | undefined,
+  workPath: string,
+): Promise<Record<string, FileFsRef>> {
+  if (!globMatcher) return {};
+
+  debug(
+    `Gathering extra files for glob \`${JSON.stringify(
+      globMatcher,
+    )}\` in ${workPath}`,
+  );
+
+  if (Array.isArray(globMatcher)) {
+    const allMatches = await Promise.all(
+      globMatcher.map((pattern) => glob(pattern, workPath)),
+    );
+
+    return allMatches.reduce((acc, matches) => ({ ...acc, ...matches }), {});
+  }
+
+  return glob(globMatcher, workPath);
+}
diff --git a/test/fixtures/01-include-files/vercel.json b/test/fixtures/01-include-files/vercel.json
index bae9a18..0a36219 100644
--- a/test/fixtures/01-include-files/vercel.json
+++ b/test/fixtures/01-include-files/vercel.json
@@ -1,7 +1,7 @@
 {
   "functions": {
     "api/**/*.rs": {
-      "runtime": "vercel-rust@4.0.0-beta.1",
+      "runtime": "vercel-rust@4.0.0-beta.2",
       "includeFiles": "static/**/*.{txt,svg}"
     }
   }
diff --git a/test/fixtures/02-with-utility/vercel.json b/test/fixtures/02-with-utility/vercel.json
index 88678ee..5ab2393 100644
--- a/test/fixtures/02-with-utility/vercel.json
+++ b/test/fixtures/02-with-utility/vercel.json
@@ -1,7 +1,7 @@
 {
   "functions": {
     "api/**/*.rs": {
-      "runtime": "vercel-rust@4.0.0-beta.1"
+      "runtime": "vercel-rust@4.0.0-beta.2"
     }
   }
 }
diff --git a/test/fixtures/03-with-function/vercel.json b/test/fixtures/03-with-function/vercel.json
index 88678ee..5ab2393 100644
--- a/test/fixtures/03-with-function/vercel.json
+++ b/test/fixtures/03-with-function/vercel.json
@@ -1,7 +1,7 @@
 {
   "functions": {
     "api/**/*.rs": {
-      "runtime": "vercel-rust@4.0.0-beta.1"
+      "runtime": "vercel-rust@4.0.0-beta.2"
     }
   }
 }
diff --git a/test/fixtures/04-with-parameter/vercel.json b/test/fixtures/04-with-parameter/vercel.json
index 88678ee..5ab2393 100644
--- a/test/fixtures/04-with-parameter/vercel.json
+++ b/test/fixtures/04-with-parameter/vercel.json
@@ -1,7 +1,7 @@
 {
   "functions": {
     "api/**/*.rs": {
-      "runtime": "vercel-rust@4.0.0-beta.1"
+      "runtime": "vercel-rust@4.0.0-beta.2"
     }
   }
 }
diff --git a/test/fixtures/05-with-similar-entrypaths/vercel.json b/test/fixtures/05-with-similar-entrypaths/vercel.json
index 88678ee..5ab2393 100644
--- a/test/fixtures/05-with-similar-entrypaths/vercel.json
+++ b/test/fixtures/05-with-similar-entrypaths/vercel.json
@@ -1,7 +1,7 @@
 {
   "functions": {
     "api/**/*.rs": {
-      "runtime": "vercel-rust@4.0.0-beta.1"
+      "runtime": "vercel-rust@4.0.0-beta.2"
     }
   }
 }