diff --git a/pkgs/development/ocaml-modules/ocaml-migrate-parsetree/default.nix b/pkgs/development/ocaml-modules/ocaml-migrate-parsetree/default.nix
index f633d17252c..bcd0a519899 100644
--- a/pkgs/development/ocaml-modules/ocaml-migrate-parsetree/default.nix
+++ b/pkgs/development/ocaml-modules/ocaml-migrate-parsetree/default.nix
@@ -2,13 +2,13 @@
 
 buildDunePackage rec {
    pname = "ocaml-migrate-parsetree";
-   version = "1.5.0";
+   version = "1.7.3";
 
    src = fetchFromGitHub {
      owner = "ocaml-ppx";
      repo = pname;
      rev = "v${version}";
-     sha256 = "0ms7nx7x16nkbm9rln3sycbzg6ad8swz8jw6bjndrill8bg3fipv";
+     sha256 = "0336vz0galjnsazbmkxjwdv1qvdqsx2rgrvp778xgq2fzasz45cx";
    };
 
    propagatedBuildInputs = [ ppx_derivers result ];
diff --git a/pkgs/development/ocaml-modules/ppxfind/default.nix b/pkgs/development/ocaml-modules/ppxfind/default.nix
index 75d1e57765e..1008dfe62a9 100644
--- a/pkgs/development/ocaml-modules/ppxfind/default.nix
+++ b/pkgs/development/ocaml-modules/ppxfind/default.nix
@@ -2,13 +2,14 @@
 
 buildDunePackage (rec {
 	pname = "ppxfind";
-	version = "1.3";
+	version = "1.4";
 	src = fetchurl {
 		url = "https://github.com/diml/ppxfind/releases/download/${version}/ppxfind-${version}.tbz";
-		sha256 = "1r4jp0516378js62ss50a9s8ql2pm8lfdd3mnk214hp7s0kb17fl";
+		sha256 = "0wa9vcrc26kirc2cqqs6kmarbi8gqy3dgdfiv9y7nzsgy1liqacq";
 	};
 
 	minimumOCamlVersion = "4.03";
+	useDune2 = true;
 
 	buildInputs = [ ocaml-migrate-parsetree ];