diff --git a/src/_pytask/task_utils.py b/src/_pytask/task_utils.py
index 59af53e..7432570 100644
--- a/src/_pytask/task_utils.py
+++ b/src/_pytask/task_utils.py
@@ -12,6 +12,7 @@ from _pytask.mark import Mark
 from _pytask.models import CollectionMetadata
 from _pytask.shared import find_duplicates
 from _pytask.typing import is_task_function
+from _pytask.exceptions import CollectionError
 
 
 __all__ = [
@@ -94,7 +95,12 @@ def task(
 
         unwrapped = inspect.unwrap(func)
 
-        raw_path = inspect.getfile(unwrapped)
+        try:
+            raw_path = inspect.getfile(unwrapped)
+        except TypeError:
+            msg = "Builtin functions cannot be wrapped"
+            raise CollectionError(msg) from None
+
         if "<string>" in raw_path:
             path = Path(unwrapped.__globals__["__file__"]).absolute().resolve()
         else: