diff --git a/repos.json.lock b/repos.json.lock
index d96cf7d55..35f29757c 100644
--- a/repos.json.lock
+++ b/repos.json.lock
@@ -16,8 +16,8 @@
             "url": "https://github.com/angr/nixpkgs"
         },
         "arc": {
-            "rev": "b9004362dc47c04de53c8783cf3155e8d6993696",
-            "sha256": "049z43sgk6mnzbk3i33chlzisycigqxpqysxjzh3b8l5rhgl20wd",
+            "rev": "fd696c82d9dd30405084f48d3c0e947a2bfbdd73",
+            "sha256": "0iy20whb6j31r65iw0jnsiavm371s32k28272wachmnpn9k1kky3",
             "url": "https://github.com/arcnmx/nixexprs"
         },
         "awl-fcarza": {