fix: pin setuptools < 72.2 only for PyPy

Author: ntamas

pyproject.toml

@@ -3,7 +3,12 @@ requires = [
     "wheel",
     # pin setuptools:
     # https://github.com/airspeed-velocity/asv/pull/1426#issuecomment-2290658198
-    "setuptools>=64,<72.2.0"
+	# Most likely cause:
+	# https://github.com/pypa/distutils/issues/283
+	# Workaround based on this commit:
+	# https://github.com/harfbuzz/uharfbuzz/commit/9b607bd06fb17fcb4abe3eab5c4f342ad08309d7
+    "setuptools>=64,<72.2.0; platform_python_implementation == 'PyPy'",
+	"setuptools>=64; platform_python_implementation != 'PyPy'"
 ]
 build-backend = "setuptools.build_meta"