--- pyproject.toml.orig
+++ pyproject.toml
@@ -1,6 +1,6 @@
 [build-system]
-build-backend = 'setuptools.build_meta'
-requires = ['setuptools>=61.2']
+build-backend = 'flit_core.buildapi'
+requires = ['flit_core>=3.3']
 
 [project]
 name = 'networkx'