Currently causing this error:

https://www.internalfb.com/phabricator/paste/view/P1215350825

Repro:

https://www.internalfb.com/phabricator/paste/view/P1215351085

Author: mergennachin

build/builder.py

@@ -206,8 +206,11 @@ def _load_model_not_gguf(builder_args):
             else:
                 checkpoint[key] = cps[0][key]
     else:
+        path = builder_args.checkpoint_path
+        if isinstance(builder_args.checkpoint_path, Path):
+            path = str(path)
         checkpoint = torch.load(
-            builder_args.checkpoint_path,
+            path,
             map_location=builder_args.device,
             mmap=True,
             weights_only=True,