diff --git a/src/_pytask/task_utils.py b/src/_pytask/task_utils.py
index 59af53e..74e8e09 100644
--- a/src/_pytask/task_utils.py
+++ b/src/_pytask/task_utils.py
@@ -92,9 +92,13 @@ def task(
                 )
                 raise ValueError(msg)
 
-        unwrapped = inspect.unwrap(func)
-
-        raw_path = inspect.getfile(unwrapped)
+        try:
+            unwrapped = inspect.unwrap(func)
+            raw_path = inspect.getfile(unwrapped)
+        except Exception:
+            msg = "Builtin functions cannot be wrapped"
+            raise ValueError(msg)
+        
         if "<string>" in raw_path:
             path = Path(unwrapped.__globals__["__file__"]).absolute().resolve()
         else: