diff --git a/pkgs/development/ocaml-modules/ocaml-migrate-parsetree/default.nix b/pkgs/development/ocaml-modules/ocaml-migrate-parsetree/1.8.x.nix
similarity index 84%
rename from pkgs/development/ocaml-modules/ocaml-migrate-parsetree/default.nix
rename to pkgs/development/ocaml-modules/ocaml-migrate-parsetree/1.8.x.nix
index bcd0a519899..faadaf214f5 100644
--- a/pkgs/development/ocaml-modules/ocaml-migrate-parsetree/default.nix
+++ b/pkgs/development/ocaml-modules/ocaml-migrate-parsetree/1.8.x.nix
@@ -2,13 +2,13 @@
 
 buildDunePackage rec {
    pname = "ocaml-migrate-parsetree";
-   version = "1.7.3";
+   version = "1.8.0";
 
    src = fetchFromGitHub {
      owner = "ocaml-ppx";
      repo = pname;
      rev = "v${version}";
-     sha256 = "0336vz0galjnsazbmkxjwdv1qvdqsx2rgrvp778xgq2fzasz45cx";
+     sha256 = "16x8sxc4ygxrr1868qpzfqyrvjf3hfxvjzmxmf6ibgglq7ixa2nq";
    };
 
    propagatedBuildInputs = [ ppx_derivers result ];
diff --git a/pkgs/development/ocaml-modules/sqlexpr/ppx.nix b/pkgs/development/ocaml-modules/sqlexpr/ppx.nix
index 863bd21c90e..572ff593615 100644
--- a/pkgs/development/ocaml-modules/sqlexpr/ppx.nix
+++ b/pkgs/development/ocaml-modules/sqlexpr/ppx.nix
@@ -6,6 +6,8 @@ buildDunePackage {
   pname = "ppx_sqlexpr";
   inherit (sqlexpr) version src meta;
 
+  minimumOCamlVersion = "4.06";
+
   postPatch = ''
     substituteInPlace src/ppx/jbuild --replace ppx_core ppxlib
   '';
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 64a23c21fc3..b4bf6f7852e 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -662,7 +662,9 @@ let
 
     ocaml-lsp = callPackage ../development/ocaml-modules/ocaml-lsp { };
 
-    ocaml-migrate-parsetree = callPackage ../development/ocaml-modules/ocaml-migrate-parsetree { };
+    ocaml-migrate-parsetree = ocaml-migrate-parsetree-1-8;
+
+    ocaml-migrate-parsetree-1-8 = callPackage ../development/ocaml-modules/ocaml-migrate-parsetree/1.8.x.nix { };
 
     ocamlmod = callPackage ../development/tools/ocaml/ocamlmod { };