When I try to use the flag I still get MetalSDF.
% flutter run --profile -d macos --no-enable-impeller
Launching lib/main.dart on macOS in profile mode...
Building macOS application...
✓ Built build/macos/Build/Products/Profile/shadow_blur_size.app (65.0MB)
2026-06-17 14:02:14.500 shadow_blur_size[57245:18492255] Running with merged UI and platform thread. Experimental.
[IMPORTANT:flutter/shell/platform/embedder/embedder_surface_metal_impeller.mm(53)] Using the Impeller rendering backend (MetalSDF).
When I try to use the flag I still get MetalSDF.