diff --git a/setuptools/command/easy_install.py b/setuptools/command/easy_install.py
index 3b63806c0a1..6ab83498787 100644
--- a/setuptools/command/easy_install.py
+++ b/setuptools/command/easy_install.py
@@ -1791,15 +1791,10 @@ def _first_line_re():
 # Must match shutil._OnExcCallback
 def auto_chmod(func: Callable[..., _T], arg: str, exc: BaseException) -> _T:
     """shutils onexc callback to automatically call chmod for certain functions."""
-    if os.name != 'nt':
-        raise OSError(f"Can't call auto_chmod on non-nt os {os.name!r}") from exc
-    supported_methods = {os.unlink, os.remove}
-    if func not in supported_methods:
-        raise ValueError(
-            f"Argument func is not one of {[method.__name__ for method in supported_methods]} (got: {func.__name__!r})"
-        ) from exc
-    chmod(arg, stat.S_IWRITE)
-    return func(arg)
+    if func in [os.unlink, os.remove] and os.name == 'nt':
+        chmod(arg, stat.S_IWRITE)
+        return func(arg)
+    raise exc
 
 
 def update_dist_caches(dist_path, fix_zipimporter_caches):