diff --git a/tvix/castore/src/import.rs b/tvix/castore/src/import.rs
index f00842bcd..675dd0ec8 100644
--- a/tvix/castore/src/import.rs
+++ b/tvix/castore/src/import.rs
@@ -209,5 +209,5 @@ pub async fn ingest_path<P: AsRef<Path> + Debug>(
         }
     }
     // unreachable, we already bailed out before if root doesn't exist.
-    panic!("tvix bug")
+    unreachable!()
 }