diff --git a/repos.json.lock b/repos.json.lock
index acd78774b..8cfeaa35f 100644
--- a/repos.json.lock
+++ b/repos.json.lock
@@ -26,8 +26,8 @@
             "url": "https://github.com/angr/nixpkgs"
         },
         "arc": {
-            "rev": "629f0fb39bb28ffdd5a4efa59229ca5e1101dd37",
-            "sha256": "1iw7ph8lzf9zw1g5z68nj0br113rgb190y26yckk9klxdia9yvy8",
+            "rev": "c40d75e0997c7f685b912e94f9e5d13488aa1e25",
+            "sha256": "0ya2qdjd8vb038bsnia157s2rnbn80a4nirf2p8cx0wyh91jz79d",
             "url": "https://github.com/arcnmx/nixexprs"
         },
         "awl-fcarza": {