api build works for conda now

llama_toolchain/common/serialize.py

@@ -5,6 +5,7 @@
 # the root directory of this source tree.
 
 import json
+from datetime import datetime
 from enum import Enum
 
 
@@ -12,4 +13,6 @@ class EnumEncoder(json.JSONEncoder):
     def default(self, obj):
         if isinstance(obj, Enum):
             return obj.value
+        elif isinstance(obj, datetime):
+            return obj.isoformat()
         return super().default(obj)