diff --git a/lib/layer.js b/lib/layer.js
index 6fe9ca4c..b7d7decb 100644
--- a/lib/layer.js
+++ b/lib/layer.js
@@ -51,7 +51,7 @@ function zipRequirements() {
       if (process.platform === 'win32') {
         fse.copySync(zipCachePath, targetZipPath);
       } else {
-        fse.symlink(zipCachePath, targetZipPath, 'file');
+        fse.symlinkSync(zipCachePath, targetZipPath, 'file');
       }
     }
   });