diff --git a/repos.json.lock b/repos.json.lock
index 4212bd6ea..31b0e497b 100644
--- a/repos.json.lock
+++ b/repos.json.lock
@@ -26,8 +26,8 @@
             "url": "https://github.com/angr/nixpkgs"
         },
         "arc": {
-            "rev": "f20d8e135ce8335cf97aabfa2d2de51fc29cba45",
-            "sha256": "1sbwq0mf81liwfbd9pkj1qbhj5hs4rph0x1dp7pjyypac9j27bra",
+            "rev": "b3574626fd2663aff73512fe074365036ae3d315",
+            "sha256": "042s8xiz4p2sl3xqzy81xsc6z1szbx4a9zwxc146i89ggckk1vx0",
             "url": "https://github.com/arcnmx/nixexprs"
         },
         "awl-fcarza": {