Add option -DPYBIND11_FINDPYTHON=ON.

setup.py

@@ -82,6 +82,7 @@ class CMakeBuild(build_ext):
             f"-DCMAKE_CXX_COMPILER={cxx_compiler}",
             f"-DENABLE_ASAN={asan}",
             "-DPYBIND=ON",
+            "-DPYBIND11_FINDPYTHON=ON",
             "-DCMAKE_EXPORT_COMPILE_COMMANDS=1",
             "-DCOVERAGE=OFF",
         ]