haxe_4_1: init at 4.1.5

pkgs/development/compilers/haxe/default.nix

···
       sha
       dune_2
       luv
-      ocaml_extlib
+      (if lib.versionAtLeast version "4.2"
+      then ocaml_extlib else ocaml_extlib-1-7-7)
     ] else with ocaml-ng.ocamlPackages_4_05; [
       ocaml
       camlp4
···
       ${defaultPatch}
       sed -i -re 's!(let +prefix_path += +).*( +in)!\1"'"$out/"'"\2!' src/main.ml
     '';
+  };
+  haxe_4_1 = generic {
+    version = "4.1.5";
+    sha256 = "0rns6d28qzkbai6yyws08yzbyvxfn848nj0fsji7chdi0y7pzzj0";
   };
   haxe_4_2 = generic {
     version = "4.2.1";

pkgs/top-level/all-packages.nix

···
 
   inherit (callPackage ../development/compilers/haxe { })
     haxe_4_2
+    haxe_4_1
     haxe_3_4
     haxe_3_2
     ;