diff --git a/repos.json.lock b/repos.json.lock
index 5bc8d8929..475c8425a 100644
--- a/repos.json.lock
+++ b/repos.json.lock
@@ -36,8 +36,8 @@
             "url": "https://github.com/angr/nixpkgs"
         },
         "arc": {
-            "rev": "c23d3a2c780b1865d56d271dea7f5f08c20c096d",
-            "sha256": "0inx0kn6risradyvhn5ziplwl3ghrwjbpmprzjys489l23xg9dj0",
+            "rev": "71d076e10b53995266343adcbfc6c8c5535d7429",
+            "sha256": "1dzjvp5zf8sw7kn947qpkiz4crdd2fyqabz6bdzw0g07mafx59b4",
             "url": "https://github.com/arcnmx/nixexprs"
         },
         "awl-fcarza": {