diff --git a/python/mozbuild/mozbuild/backend/fastermake.py b/python/mozbuild/mozbuild/backend/fastermake.py
index d55928e8c7..0ca385187b 100644
--- a/python/mozbuild/mozbuild/backend/fastermake.py
+++ b/python/mozbuild/mozbuild/backend/fastermake.py
@@ -79,7 +79,7 @@ class FasterMakeBackend(CommonBackend, PartialBackend):
                             .add_pattern_symlink(
                                 prefix,
                                 f.full_path[len(prefix):],
-                                mozpath.join(path, f.target_basename))
+                                path)
                     else:
                         self._install_manifests[obj.install_target].add_symlink(
                             f.full_path,