--- pyproject.toml.orig	2026-07-22 21:59:38 UTC
+++ pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ['setuptools >= 77.0.3']
+requires = ['setuptools >= 61.0']
 build-backend = 'setuptools.build_meta'
 
 [project]
@@ -7,8 +7,8 @@ readme = 'README.rst'
 description='Atomic Simulation Environment'
 dynamic = ['version']
 readme = 'README.rst'
-license = 'LGPL-2.1-or-later'
-license-files = ['LICENSE']
+license = {text = 'LGPL-2.1-or-later'}
+# license-files removed for old setuptools
 maintainers = [{ name = 'ASE Steering Committee', email = 'ase-committee@listserv.fysik.dtu.dk' }]
 classifiers = [
     'Development Status :: 6 - Mature',