diff --git a/repos.json.lock b/repos.json.lock
index a53b7f729..be4d6dd0d 100644
--- a/repos.json.lock
+++ b/repos.json.lock
@@ -11,8 +11,8 @@
             "url": "https://gricad-gitlab.univ-grenoble-alpes.fr/Projets-INFO4/18-19/19/code"
         },
         "arc": {
-            "rev": "3bac739439c540506aa8415e1b94b86c65c7b2b1",
-            "sha256": "18cd0q93xw3yrfap34aklyzv5f100rzwbxqk4kb30r8ppmlbmgjp",
+            "rev": "c65068e732d9feb64ba4846b1813bb7720a54349",
+            "sha256": "0mp0wrzw3w6az23vihb8ja72kkfk3rbk074piyi2a59pfl85dfn0",
             "url": "https://github.com/arcnmx/nixexprs"
         },
         "balsoft": {