diff --git a/repos.json.lock b/repos.json.lock
index b5b041798..098faa8af 100644
--- a/repos.json.lock
+++ b/repos.json.lock
@@ -26,8 +26,8 @@
             "url": "https://github.com/angr/nixpkgs"
         },
         "arc": {
-            "rev": "82ae4b8f2e9e9cc2b9c017964c35aaac16e91d73",
-            "sha256": "152w3sa5yshajw5ik43givlx4234r2kf8iwqa4zhn9s2b8fac835",
+            "rev": "50d17d285b43482eb25e60ba5888ac7978cc6635",
+            "sha256": "1w01bq1mv6mrd396vd8fgd5b9lhcg126jsqyf4dhhyvsmislz3jc",
             "url": "https://github.com/arcnmx/nixexprs"
         },
         "awl-fcarza": {