diff --git a/repos.json.lock b/repos.json.lock
index 49c49723a..544a79509 100644
--- a/repos.json.lock
+++ b/repos.json.lock
@@ -16,8 +16,8 @@
             "url": "https://github.com/angr/nixpkgs"
         },
         "arc": {
-            "rev": "f18861208da0c88c6f006cb82212a98715afa99d",
-            "sha256": "0x5jg44npi4r0ng50mbqxcbmiyla9jc6qdwbcsrr3gaasnf84c6b",
+            "rev": "246b0c3642a1d08ce39e5a71db5cc17309785c1b",
+            "sha256": "09l1ibvd6xbl3rh4pdpyrc1rp9p4520xsgff6nnf1vnpkjqqlzbm",
             "url": "https://github.com/arcnmx/nixexprs"
         },
         "awl-fcarza": {