build: Don't require file existence

ritchie46 · ritchie46 · commit e9fce558b4ff · 2025-10-26T17:00:55.000+01:00
diff --git a/py-polars/runtime/_polars_runtime_64/__init__.py b/py-polars/runtime/_polars_runtime_64/__init__.py
@@ -1,4 +1,7 @@
 # ruff: noqa: TID252
-from .build_feature_flags import BUILD_FEATURE_FLAGS
+try:
+    from .build_feature_flags import BUILD_FEATURE_FLAGS
+except ImportError:
+    BUILD_FEATURE_FLAGS = ""
 
 __all__ = ["BUILD_FEATURE_FLAGS"]
