diff --git a/src/utils/rollup-plugins/patch-binary.ts b/src/utils/rollup-plugins/patch-binary.ts
index fd3ea50..132d2b8 100644
--- a/src/utils/rollup-plugins/patch-binary.ts
+++ b/src/utils/rollup-plugins/patch-binary.ts
@@ -20,7 +20,7 @@ export const patchBinary = (
 		}
 
 		const entryFileNames = outputOptions.entryFileNames as (chunk: RenderedChunk) => string;
-		const outputPath = `./${path.join(outputOptions.dir!, entryFileNames(chunk))}`;
+		const outputPath = `./${path.posix.join(outputOptions.dir!, entryFileNames(chunk))}`;
 
 		if (executablePaths.includes(outputPath)) {
 			const transformed = new MagicString(code);
@@ -44,7 +44,7 @@ export const patchBinary = (
 			const outputChunk = chunk as OutputChunk;
 
 			if (outputChunk.isEntry && outputChunk.facadeModuleId) {
-				const outputPath = path.join(outputOptions.dir!, entryFileNames(outputChunk));
+				const outputPath = `./${path.posix.join(outputOptions.dir!, entryFileNames(outputChunk))}`;
 				await fs.promises.chmod(outputPath, 0o755);
 			}
 		});
diff --git a/tests/specs/builds/bin.ts b/tests/specs/builds/bin.ts
index 43a65b0..5a35b86 100644
--- a/tests/specs/builds/bin.ts
+++ b/tests/specs/builds/bin.ts
@@ -19,17 +19,18 @@ export default testSuite(({ describe }, nodePath: string) => {
 			expect(pkgrollProcess.exitCode).toBe(0);
 			expect(pkgrollProcess.stderr).toBe('');
 
-			if (process.platform !== 'win32') {
-				await test('is executable', async () => {
-					const content = await fixture.readFile('dist/index.mjs', 'utf8');
-					expect(content).toMatch('#!/usr/bin/env node');
+			await test('is executable', async () => {
+				const content = await fixture.readFile('dist/index.mjs', 'utf8');
+				expect(content).toMatch('#!/usr/bin/env node');
 
+				// File modes don't exist on Windows
+				if (process.platform !== 'win32') {
 					const stats = await fs.stat(`${fixture.path}/dist/index.mjs`);
 					const unixFilePermissions = `0${(stats.mode & 0o777).toString(8)}`; // eslint-disable-line no-bitwise
 
 					expect(unixFilePermissions).toBe('0755');
-				});
-			}
+				}
+			});
 		});
 
 		test('supports object', async ({ onTestFinish }) => {