diff --git a/lib/filesystem.js b/lib/filesystem.js
index 85e1eb0..552055e 100644
--- a/lib/filesystem.js
+++ b/lib/filesystem.js
@@ -98,7 +98,7 @@ class Filesystem {
   insertLink (p) {
     const link = path.relative(fs.realpathSync(this.src), fs.realpathSync(p))
     if (link.substr(0, 2) === '..') {
-      throw new Error(`${p}: file links out of the package`)
+      throw new Error(`${p}: file "${link}" links out of the package`)
     }
     const node = this.searchNodeFromPath(p)
     node.link = link