diff --git a/repos.json.lock b/repos.json.lock
index d57d2a735..b520d3ae5 100644
--- a/repos.json.lock
+++ b/repos.json.lock
@@ -21,8 +21,8 @@
             "url": "https://github.com/angr/nixpkgs"
         },
         "arc": {
-            "rev": "2c0b4fee04049943ae7d09effd51c8fe601a6d25",
-            "sha256": "1balr1mpvvc89y781si6wgml5rxd2sha8d2vza118g4vybi4z673",
+            "rev": "004b34fff65ce521357c7b2155bf431c6ca7b95c",
+            "sha256": "0v8962psa5dcwl320kzw7pbvl2hbcglg8ixkvl1mj0wizvx2b7as",
             "url": "https://github.com/arcnmx/nixexprs"
         },
         "awl-fcarza": {