diff --git a/repos.json.lock b/repos.json.lock
index a979eac99..25b8c7f86 100644
--- a/repos.json.lock
+++ b/repos.json.lock
@@ -16,8 +16,8 @@
             "url": "https://github.com/angr/nixpkgs"
         },
         "arc": {
-            "rev": "c72734e0bf3ebe841f2ff4724ff2235cf4d9adcf",
-            "sha256": "1nmxlzx99aa85vhkmcdfh31zfxxb4k9jh9zqsgx2p8z7w53nv4gh",
+            "rev": "8895ed8221fb29ac2973c3dce8f8531c06c092a5",
+            "sha256": "19phhsfrcm1cz7585nbvj3v8i0dm5v1r6kcypyr4382q7i6bn66y",
             "url": "https://github.com/arcnmx/nixexprs"
         },
         "awl-fcarza": {