diff --git a/engine.spec b/engine.spec
index 1133b37..fbce929 100644
--- a/engine.spec
+++ b/engine.spec
@@ -56,13 +56,13 @@ datas += collect_data_files('librosa', includes=['**/*.pyi'])
 import importlib.util as _ilu
 import glob as _glob
 _scipy_spec = _ilu.find_spec('scipy')
-_scipy_dir = _os.path.dirname(_os.path.abspath(_scipy_spec.origin))
+_scipy_dir = os.path.dirname(os.path.abspath(_scipy_spec.origin))
 _scipy_hidden = []
 for _ext in ('*.py', '*.pyd', '*.so'):
-    for _f in _glob.glob(_os.path.join(_scipy_dir, '**', _ext), recursive=True):
-        _rel = _os.path.relpath(_f, _scipy_dir)
-        _base = _os.path.basename(_rel).split('.')[0]  # bo .cpython-312-x86_64... .so
-        _pkg = _os.path.dirname(_rel).replace(_os.sep, '.')
+    for _f in _glob.glob(os.path.join(_scipy_dir, '**', _ext), recursive=True):
+        _rel = os.path.relpath(_f, _scipy_dir)
+        _base = os.path.basename(_rel).split('.')[0]  # bo .cpython-312-x86_64... .so
+        _pkg = os.path.dirname(_rel).replace(os.sep, '.')
         _mod = ('scipy.' + _pkg + '.' + _base) if _pkg else ('scipy.' + _base)
         if _mod not in _scipy_hidden:
             _scipy_hidden.append(_mod)