diff --git a/repos.json.lock b/repos.json.lock
index 24d942231..bfb450cb8 100644
--- a/repos.json.lock
+++ b/repos.json.lock
@@ -16,8 +16,8 @@
             "url": "https://github.com/angr/nixpkgs"
         },
         "arc": {
-            "rev": "ef76355f6d59e2c1652d2f3eff6bfd3a2e91a4a2",
-            "sha256": "1idywc9ilqic9ip4q1dl1f5yrm2vrx2ilyhwjs675d33si6kazdr",
+            "rev": "8dfe540eedc52cdcaa1d527a1e45d2fa71755435",
+            "sha256": "1h6siv32ldi0hwkw39s95nql5k6drg52yvwcqyrn25n9jw16ys4p",
             "url": "https://github.com/arcnmx/nixexprs"
         },
         "awl-fcarza": {