diff --git a/pkgs/applications/science/logic/acgtk/default.nix b/pkgs/applications/science/logic/acgtk/default.nix
index c627b8a3c8f5..693bc306f21e 100644
--- a/pkgs/applications/science/logic/acgtk/default.nix
+++ b/pkgs/applications/science/logic/acgtk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitLab, dune_2, ocamlPackages }:
+{ lib, stdenv, fetchFromGitLab, dune_3, ocamlPackages }:
 
 stdenv.mkDerivation {
 
@@ -15,7 +15,7 @@ stdenv.mkDerivation {
 
   strictDeps = true;
 
-  nativeBuildInputs = with ocamlPackages; [ menhir ocaml findlib dune_2 ];
+  nativeBuildInputs = with ocamlPackages; [ menhir ocaml findlib dune_3 ];
 
   buildInputs = with ocamlPackages; [
     ansiterminal cairo2 cmdliner fmt logs menhirLib mtime sedlex yojson