--- pyproject.toml.orig	2023-01-05 03:33:54 UTC
+++ pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools>=40.8.0", "ninja", "wheel", "pybind11>=2.10.1"]
+requires = ["setuptools>=40.8.0", "wheel", "pybind11>=2.10.1"]
 build-backend = "setuptools.build_meta"
 
 [tool.pytype]
@@ -19,4 +19,4 @@ exclude = [
     "**/*_test_*.py",
     "pytype/tools/merge_pyi/test_data/",
     "pytype/tools/xref/testdata/",
-]
\ No newline at end of file
+]