diff --git a/expandybird/expansion/sandbox_loader.py b/expandybird/expansion/sandbox_loader.py
index bbed8473a..f0fcde48c 100644
--- a/expandybird/expansion/sandbox_loader.py
+++ b/expandybird/expansion/sandbox_loader.py
@@ -95,10 +95,11 @@ def process_imports(imports):
 
   # Now build the hierarchical modules.
   for k in imports.keys():
-    if imports[k]['path'].endswith('.jinja'):
+    path = imports[k]['path']
+    if path.endswith('.jinja'):
       continue
     # Normalize paths and trim .py extension, if any.
-    normalized = os.path.splitext(os.path.normpath(k))[0]
+    normalized = os.path.splitext(os.path.normpath(path))[0]
     # If this is actually a path and not an absolute name, split it and process
     # the hierarchical packages.
     if sep in normalized: