diff --git a/repos.json.lock b/repos.json.lock
index 54f510b5d..9411efad8 100644
--- a/repos.json.lock
+++ b/repos.json.lock
@@ -16,8 +16,8 @@
             "url": "https://github.com/angr/nixpkgs"
         },
         "arc": {
-            "rev": "56249a5d8b335e4c6a347d64a54750fd3b75de2b",
-            "sha256": "0yfqzf2ipxy7ya8cll6fzg7wgicz7vnz5w023v340giwz79jcmxp",
+            "rev": "eb78df76c50962107276657112558d1a83297fca",
+            "sha256": "1jjzhsw2imxgmx9caa53nz1b56s0zda6sp30hqv11agia9qbx0z0",
             "url": "https://github.com/arcnmx/nixexprs"
         },
         "awl-fcarza": {