diff --git a/llama_stack/distribution/utils/model_utils.py b/llama_stack/distribution/utils/model_utils.py
index e104965a5..abd0dc087 100644
--- a/llama_stack/distribution/utils/model_utils.py
+++ b/llama_stack/distribution/utils/model_utils.py
@@ -4,11 +4,10 @@
 # This source code is licensed under the terms described in the LICENSE file in
 # the root directory of this source tree.
 
-import os
+from pathlib import Path
 
 from .config_dirs import DEFAULT_CHECKPOINT_DIR
 
 
 def model_local_dir(descriptor: str) -> str:
-    path = os.path.join(DEFAULT_CHECKPOINT_DIR, descriptor)
-    return path.replace(":", "-")
+    return str(Path(DEFAULT_CHECKPOINT_DIR) / (descriptor.replace(":", "-")))