diff --git a/repos.json.lock b/repos.json.lock
index 3a1487089..f899b970c 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": "c00b928a34a8979e5e626b8aed03aeda1dfc3bf4",
-            "sha256": "0h3370z266vz5cck54rccivpq1gmxm3vg099p8a5gic2h3x0h8z6",
+            "rev": "eb42fd1f6b45e993212e8dc92f94c550df852cd6",
+            "sha256": "0036i5s9qf1x7vx99x3j3hzrfb0ypa4b375nylsw6c899sfpqqs5",
             "url": "https://github.com/arcnmx/nixexprs"
         },
         "balsoft": {