diff --git a/repos.json.lock b/repos.json.lock
index fb67ee905..b015e6625 100644
--- a/repos.json.lock
+++ b/repos.json.lock
@@ -26,8 +26,8 @@
             "url": "https://github.com/angr/nixpkgs"
         },
         "arc": {
-            "rev": "68949988e7c3fd0d67c116cbe1e8c1d67d6fe1b0",
-            "sha256": "1khlpn3ns8a8sy731fq6sfaqlx41hzxgnnqaivh01y3nzwbbdxwr",
+            "rev": "494a2a5da895674fef204cb665acfa015fe305be",
+            "sha256": "031siha1yza99dxi8gyvzns860wwigf4vfq5aajij0mw6r2b2czg",
             "url": "https://github.com/arcnmx/nixexprs"
         },
         "awl-fcarza": {