diff --git a/repos.json.lock b/repos.json.lock
index 2575d68f9..54f0cb29f 100644
--- a/repos.json.lock
+++ b/repos.json.lock
@@ -61,8 +61,8 @@
             "url": "https://github.com/angr/nixpkgs"
         },
         "arc": {
-            "rev": "cd53ad2c06aaa0f3b045390cc712fb61bd2ccaa3",
-            "sha256": "1y3l94kxphs3h30760vsgbi7ndkpws3kwa45vas9dg9hg31i7mdf",
+            "rev": "63df9a52028468f349ceab5ec1611573ff29aef5",
+            "sha256": "0a287ay9xc0dd46kkds9dx1ri0ibwf1dz6lkgr9ai6cbf28qjwxy",
             "url": "https://github.com/arcnmx/nixexprs"
         },
         "artturin": {