diff --git a/scripts/conv_linker_config.py b/scripts/conv_linker_config.py
index c6e6e30..ed3fbb7 100644
--- a/scripts/conv_linker_config.py
+++ b/scripts/conv_linker_config.py
@@ -149,6 +149,11 @@
     else:
         sys.exit(f'Unknown type: {args.type}')
 
+    # Reject contributions field at build time while keeping the runtime behavior for GRF.
+    if getattr(pb, 'contributions'):
+        sys.exit(f"{args.input}: 'contributions' is set. "
+                 "It's deprecated. Instead, make the APEX 'visible' and use android_dlopen_ext().")
+
 
 def ValidateAndWriteAsPbFile(pb, output_path):
     ValidateConfiguration(pb)