diff --git a/pkgs/development/compilers/haxe/default.nix b/pkgs/development/compilers/haxe/default.nix
index d5277899892..4ac022be6a9 100644
--- a/pkgs/development/compilers/haxe/default.nix
+++ b/pkgs/development/compilers/haxe/default.nix
@@ -3,7 +3,7 @@
 let
   ocamlDependencies = version:
     if lib.versionAtLeast version "4.2"
-    then with ocaml-ng.ocamlPackages; [
+    then with ocaml-ng.ocamlPackages_4_12; [
       ocaml
       findlib
       sedlex_2