--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,8 +33,8 @@ requires = [
   "setuptools>=42",
   "scikit-build",
   ## out-comment not install cmake/ninja via pip
-  "cmake>=3.21",
-  "ninja; platform_system!='Windows'"
+  #"cmake>=3.21",
+  #"ninja; platform_system!='Windows'"
 ]
 build-backend = "setuptools.build_meta"