diff --git a/repos.json.lock b/repos.json.lock
index b47975dde..c802140a0 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": "fd6b721fed09da162a41f66793aaf01184baca59",
-            "sha256": "1cb57hajj4gfsi6mdr1x16d29v6x17azj3hm5axsn01bqfc8a3wm",
+            "rev": "2548cea8d4cd3cdb5e02a0a444b1a47a9a20abb7",
+            "sha256": "01kvxr42jyirsl0yvzp4a0b0y1pjml7077arxk6ghy8ggndcpjww",
             "url": "https://github.com/arcnmx/nixexprs"
         },
         "balsoft": {