diff --git a/__tests__/package-hoister.js b/__tests__/package-hoister.js
new file mode 100644
index 0000000000..394f42a10e
--- /dev/null
+++ b/__tests__/package-hoister.js
@@ -0,0 +1,34 @@
+/* @flow */
+
+import path from 'path';
+import PackageHoister, {HoistManifest} from '../src/package-hoister.js';
+
+const mockConfig = {
+  cwd: __dirname,
+  getFolder(): string {
+    return 'node_modules';
+  },
+};
+
+test('Produces valid destination paths for scoped modules', () => {
+  const expected = path.join(__dirname, './node_modules/@scoped/dep');
+  const scopedPackageName = '@scoped/dep';
+
+  const key = scopedPackageName;
+  const parts = [scopedPackageName];
+  const pkg = {_reference: {}};
+  const loc = null;
+  const info = new HoistManifest(key, parts, pkg, loc);
+
+  const tree = new Map([
+    ['@scoped/dep', info],
+  ]);
+
+  const packageHoister = new PackageHoister(mockConfig);
+  packageHoister.tree = tree;
+
+  const result = packageHoister.init();
+  const [actual] = result[0];
+
+  expect(actual).toEqual(expected);
+});
diff --git a/src/package-hoister.js b/src/package-hoister.js
index ab1c3630f9..c09af00b9c 100644
--- a/src/package-hoister.js
+++ b/src/package-hoister.js
@@ -369,7 +369,7 @@ export default class PackageHoister {
         parts.unshift(this.config.cwd);
       }
 
-      const loc = parts.join(path.sep);
+      const loc = path.join(...parts);
       flatTree.push([loc, info]);
     }
 
diff --git a/src/util/fs.js b/src/util/fs.js
index 27e30d0321..b5e9d25ed8 100644
--- a/src/util/fs.js
+++ b/src/util/fs.js
@@ -117,7 +117,7 @@ async function buildActionsForCopy(
     const {src, dest} = data;
     const onFresh = data.onFresh || noop;
     const onDone = data.onDone || noop;
-    files.add(path.normalize(dest));
+    files.add(dest);
 
     if (events.ignoreBasenames.indexOf(path.basename(src)) >= 0) {
       // ignored file
@@ -191,7 +191,7 @@ async function buildActionsForCopy(
     } else if (srcStat.isDirectory()) {
       await mkdirp(dest);
 
-      const destParts = path.normalize(dest).split(path.sep);
+      const destParts = dest.split(path.sep);
       while (destParts.length) {
         files.add(destParts.join(path.sep));
         destParts.pop();