diff --git a/.nix/catala.nix b/.nix/catala.nix
index d487f42c..ef9d5f73 100644
--- a/.nix/catala.nix
+++ b/.nix/catala.nix
@@ -13,6 +13,7 @@
 , js_of_ocaml-ppx
 , menhir
 , menhirLib
+, ocaml-crunch
 , ocamlgraph
 , pkgs
 , ppx_deriving
@@ -37,7 +38,7 @@ buildDunePackage {
 
   duneVersion = "3";
 
-  nativeBuildInputs = [ cppo menhir ];
+  nativeBuildInputs = [ cppo menhir ocaml-crunch ];
 
   propagatedBuildInputs = [
     alcotest
@@ -49,6 +50,7 @@ buildDunePackage {
     js_of_ocaml
     js_of_ocaml-ppx
     menhirLib
+    ocaml-crunch
     ocamlgraph
     pkgs.z3
     ppx_deriving