diff --git a/_setup.py b/_setup.py
index 1a8b9e0246..4a8a12a15a 100644
--- a/_setup.py
+++ b/_setup.py
@@ -130,7 +130,7 @@ def build_extension(self, ext):
     except ValueError:
         pass
     ext_modules = []
-elif sys.platform.startswith("java") or sys.platform == "cli" or "PyPy" in sys.version:
+elif sys.platform.startswith("java") or sys.implementation.name in ('pypy', 'graalpy'):
     sys.stdout.write(
         """
 *****************************************************\n