diff --git a/nix/frama-ci.nix b/nix/frama-ci.nix
index 7939e05dd1161d65a13c6d4093cfff78d3f3fe81..4e5185862ac622e6cdc66c2145ef69af6b91c616 100644
--- a/nix/frama-ci.nix
+++ b/nix/frama-ci.nix
@@ -5,8 +5,8 @@ let
     src = builtins.fetchGit {
             "url" = "https://bobot:${password}@git.frama-c.com/frama-c/Frama-CI.git";
             "name" = "Frama-CI";
-            "rev" = "3e8a67b19d5923c651509070eec5db646b80ec32";
-            "ref" = "master";
+            "rev" = "e19435131b0b862509c04aaf0cb8492554fb9d1f";
+            "ref" = "update-opam-repo";
     };
  in
  {