diff --git a/repos.json.lock b/repos.json.lock
index e9d600d83..24e2e00a0 100644
--- a/repos.json.lock
+++ b/repos.json.lock
@@ -16,8 +16,8 @@
             "url": "https://github.com/angr/nixpkgs"
         },
         "arc": {
-            "rev": "a977981da3653902e7c56a258734a82232d23c12",
-            "sha256": "0qw19lzddvd71b29yrm1q26c4547kppygpjzz4fiffdkdax1jqc5",
+            "rev": "f18861208da0c88c6f006cb82212a98715afa99d",
+            "sha256": "0x5jg44npi4r0ng50mbqxcbmiyla9jc6qdwbcsrr3gaasnf84c6b",
             "url": "https://github.com/arcnmx/nixexprs"
         },
         "awl-fcarza": {