diff --git a/repos.json.lock b/repos.json.lock
index 1cc04a1ab..3eb4b937a 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": "6d305546dbe65a1617126b3294ed9fdad18c3cd4",
-            "sha256": "1zqckmd3liq5pd0my9p99bphp5rglc1i33g7czpbdhvr9xrfh4rn",
+            "rev": "94c37724a8d424851c025aaad5cb42c336a9f783",
+            "sha256": "1awls4v4wmwqw6dkgi3n2i5a279xllggsvf0cnvwx719i3ab6bnq",
             "url": "https://github.com/arcnmx/nixexprs"
         },
         "bb010g": {