diff --git a/nix/default.nix b/nix/default.nix
index 0f380373a53fc10aba0829a34c6ae84732e4c7a6..5bd4d181773a37483950d211d9759ab67b7cff4b 100644
--- a/nix/default.nix
+++ b/nix/default.nix
@@ -13,6 +13,7 @@ let mydir = builtins.getEnv("PWD");
         "coq=8.13.0" "alt-ergo=2.2.0"
         "why3=1.4.0" "why3-coq=1.4.0"
         "menhir=20211012"
+        "easy-format=1.3.2"
       ];
     # only pure nix packages. See mk_deriv below for adding opam2nix packages
     mk_buildInputs = { nixPackages ? [] } :
diff --git a/nix/frama-ci.nix b/nix/frama-ci.nix
index b71b4dc788b1fae3d160b9699089aaecd55f7f0c..8e700b2270b60cc743d8a8e06c890a88a60f7da7 100644
--- a/nix/frama-ci.nix
+++ b/nix/frama-ci.nix
@@ -5,7 +5,7 @@ let
     src = builtins.fetchGit {
             "url" = "https://bobot:${password}@git.frama-c.com/frama-c/Frama-CI.git";
             "name" = "Frama-CI";
-            "rev" = "22ccb4e8951b6ac6eb62b0b0c6a53f9a98c94951";
+            "rev" = "e33541f771435c6b1014acf1b042f569deadb663";
             "ref" = "master";
     };
     pkgs = import "${src}/pkgs.nix" {};