diff --git a/lib/spack/spack/stage.py b/lib/spack/spack/stage.py
index e8239d27bef..d5ee231ef71 100644
--- a/lib/spack/spack/stage.py
+++ b/lib/spack/spack/stage.py
@@ -506,6 +506,7 @@ def destroy(self):
     def cache_local(self):
         tty.msg("Sources for DIY stages are not cached")
 
+
 def _get_mirrors():
     """Get mirrors from spack configuration."""
     config = spack.config.get_config('mirrors')