diff --git a/repos.json.lock b/repos.json.lock
index db49f6567..f128eac33 100644
--- a/repos.json.lock
+++ b/repos.json.lock
@@ -46,8 +46,8 @@
             "url": "https://github.com/angr/nixpkgs"
         },
         "arc": {
-            "rev": "487309091a1fdf128578fe8e792ee5a620ba5469",
-            "sha256": "143f42lysimq4w330s27wcqi24jng3ryi3r9aqqvhbpx2aqx2zxa",
+            "rev": "e518879b77048487c18a36dca20fa9e213f1a44a",
+            "sha256": "1yksj6nd7dl27kqkwajj9m5ivqr9w66r9pffm2n0fx873hgvq2m0",
             "url": "https://github.com/arcnmx/nixexprs"
         },
         "artturin": {