diff --git a/repos.json.lock b/repos.json.lock
index 6ac3a6fef..8a24c82ad 100644
--- a/repos.json.lock
+++ b/repos.json.lock
@@ -21,8 +21,8 @@
             "url": "https://github.com/angr/nixpkgs"
         },
         "arc": {
-            "rev": "004b34fff65ce521357c7b2155bf431c6ca7b95c",
-            "sha256": "0v8962psa5dcwl320kzw7pbvl2hbcglg8ixkvl1mj0wizvx2b7as",
+            "rev": "b697d86d7df9387f6686e679aadd81d4b63262ab",
+            "sha256": "1kp1fjm2pmgcpxpnxvvj2yyqq867qvp3il6s391cd8sf1csigfkv",
             "url": "https://github.com/arcnmx/nixexprs"
         },
         "awl-fcarza": {